Abstract: This invention relates to safe immobilization and disposal of arsenic found in industrial waste streams and residues in the form of clean and compact well grown scorodite solids.

Abstract: The present invention relates to the use of arsenic compounds such as sodium meta arsenite (NaAsO2), arsenic trioxide (As2O3), and arsenic hexoxide (As4O6) or combinations thereof, for the treatment of painful, hyperalgesic and/or inflammatory conditions. The present invention also relates to compositions containing the above arsenic compounds for use in the treatment of pain, inflammation and immunological and autoimmune diseases and disorders.

Abstract: Electrically conducting vanadium arsenate or vanadium phosphate materials are described. The materials include a vanadium arsenate or vanadium phosphate framework structure about organic template and water molecules which may be removed to leave a microporous structure. The three-dimensional vanadium framework may provide electronic conductivity, while the extra-framework constituents may provide ionic conductivity.

Abstract: It is an object of the present invention to provide a beneficial method for detoxifying a harmful compound to detoxify the harmful compound containing arsenic etc., effectively. The method of detoxifying a harmful compound according to the present invention is characterized in that a methyl radical and/or a carboxymethyl radical is (are) contacted with a harmful compound comprising at least one element selected from the group comprising arsenic, antimony and selenium to detoxify the harmful compound. Furthermore, in a preferred embodiment of the method of detoxifying a harmful compound according to the present invention, the method is characterized in that the radical is generated by the exposure to light.

Abstract: It is an object of the present invention to provide a method of detoxifying a methyl compound comprising arsenic etc., effectively and systematically. The method of detoxifying a methyl compound according to the present invention is characterized in that an organic halogenated compound is reacted with a methyl compound comprising at least one element selected from the groups comprising arsenic, antimony and selenium to convert the methyl compound into more harmless substances. Furthermore, in a preferred embodiment of the method of detoxifying a methyl compound according to the present invention, the method is characterized in that the element is arsenic.

Abstract: A cosmetic material that exhibits sufficient shielding effects against UV-A and UV-B, does not color a resultant cosmetic product even when blended in cosmetic materials, and will not result in a non-powdery finish when applied to the skin, and a method for producing such a cosmetic material are provided. It is a cosmetic material with at least part of InTaO4 substituted with at least one element of Sc, Ti, V, Cr, Mn, Co, Cu, Ga, Ge, As, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, Sn, Sb, Hf, W, Re, Os, Ir, Pt, Au, and Hg.

Abstract: Provided is an arsenic-containing solid comprising 100 parts by mass of a scorodite-type iron-arsenic compound and at least 1 part by mass of an iron oxide compound added thereto, in which the scorodite-type iron-arsenic compound is produced by adding an oxidizing agent to an aqueous acidic solution that contains a 5-valent arsenic (V) ion and a 2-valent iron (II) ion, then promoting the precipitation of an iron-arsenic compound with stirring the liquid, and finishing the precipitation thereof within a range where the pH of the liquid is at most 1.2. The iron oxide compound includes goethite, hematite and their mixture, preferably having a BET specific surface area of at least 3 m2/g, more preferably at least 20 m2/g.

Abstract: Disclosed is a superconducting compound which has a structure obtained by partially substituting oxygen ions of a compound, which is represented by the following chemical formula; LnTMOPh [wherein Ln represents at least one element selected from Y and rare earth metal elements (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu), TM represents at least one element selected from transition metal elements (Fe, Ru, Os, Ni, Pd and Pt), and Pn represents at least one element selected from pnictide elements (N, P, As and Sb)] and has a ZrCuSiAs-type crystal structure (space group P4/nmm), with at least one kind of monovalent anion (F?, Cl? or Br?). The superconducting compound alternatively has a structure obtained by partially substituting Ln ions of the compound with at least one kind of tetravalent metal ion (Ti4+, Zr4+, Hf4+, C4+, Si4+, Ge4+, Sn4+ or Pb4+) or a structure obtained by partially substituting Ln ions of the compound with at least one kind of divalent metal ion (Mg2+, Ca2+, Sr2+ or Ba2+).

Abstract: The present invention is to provide a process for producing a scorodite that can shorten the time required for synthesizing the scorodite, and further can improve the yield of arsenic and iron into the scorodite. Accordingly, a process for producing a crystalline scorodite from an acidic aqueous solution containing pentavalent As and trivalent Fe, wherein the synthesis of the crystalline scorodite is performed after the molar ratio of trivalent Fe to pentavalent As contained in the acidic aqueous solution is adjusted to be equal to or more than 0.9 and equal to or less than 1.1 is provided.

Abstract: A method for using a salt of meta-arsenite (AsO2—) to suppress growing of human cancer cells is provided to find a method of curing human cancers. Effects of the salt of meta-arsenite (AsO2—) on various human cancer cells are investigated via in vitro cytotoxic activity and in vivo anticancer activity against nude mice. For in vitro cytotoxic activity, six (6) kinds of human cancer with nine (9) cancer cell lines, eight (8) kinds of human cancers with twelve (12) cancer cell lines and ten (10) kinds of human cancers with forty one (41) cancer cell lines are tested. For in vivo anticancer activity, two (2) kinds of cancers of human renal cancer RXF 944LX and leukemia cells are tested utilizing nude mice.

Abstract: Provided is a method of easily producing easily-filterable and stable scorodite that meets the leaching standard (conformance to Japanese Environmental Agency Notice 13) with excellent reproducibility and without using complex operations, when processing arsenic that is included in non-ferrous smelting intermediates, and particularly when processing arsenic in the form of a sulfide. Scorodite is produced by a leaching step of leaching arsenic from a non-ferrous melting intermediate containing arsenic in the weakly acid region, a solution adjusting step of oxidizing trivalent arsenic to pentavalent arsenic by adding an oxidizing agent to the leaching solution, and a crystallizing step of converting the arsenic in the adjusted solution to scorodite crystals.

Abstract: The present invention provides a method for manufacturing scorodite in which scorodite may be obtained at high production efficiency and a high As concentration ratio. The present invention provides a method for manufacturing crystalline scorodite from acidic aqueous solution containing pentavalent As and trivalent Fe, the method comprising a step for adding a basic sodium compound to the acidic aqueous solution such that the sodium concentration in the acidic aqueous solution becomes larger than 0 g/L and equal to or less than 4 g/L.

Abstract: The present invention is generally directed to a novel, economic synthesis of oxide ceramic composites. Methods of the present invention, referred to as carbon combustion synthesis of oxides (CCSO), are a modification of self-propagating high-temperature synthesis (SHS) methods in which the heat needed for the synthesis is generated by combustion of carbon in oxygen rather than that of a pure metal. This enables a more economic production of the ceramic material and minimizes the presence of intermediate metal oxides in the product. The reactant mixture generally comprises at least one oxide precursor (e.g., a metal or non metal oxide, or super oxide, or nitride, or carbonate, or chloride, or oxalate, or halides) as a reactant, but no pure metal. Pure carbon in the form of graphite or soot is added to the reactant mixture to generate the desired heat (upon ignition). The mixture is placed in a reactor and exposed to gaseous oxygen.

Abstract: A process comprises (a) combining (1) at least one base and (2) at least one metal carboxylate salt comprising (i) a metal cation selected from metal cations that form amphoteric metal oxides or oxyhydroxides and (ii) a lactate or thiolactate anion, or metal carboxylate salt precursors comprising (i) at least one metal salt comprising the metal cation and a non-interfering anion and (ii) lactic or thiolactic acid, a lactate or thiolactate salt of a non-interfering, non-metal cation, or a mixture thereof; and (b) allowing the base and the metal carboxylate salt or metal carboxylate salt precursors to react.

Abstract: This invention relates to a Polyoxometalate (POM) represented by the formula: (An)m+[HqM16X8W48O184(OH)32]m? or solvates thereof, wherein: A represents a cation, n is the number of the cations A, m is the charge of the polyoxoanion, q is the number of protons and varies from 0 to 12, M represents a transition metal, and X represents a heteroatom selected from P, As and mixtures thereof. This invention also relates to a process to produce such POMs and to a process for the homogeneous or heterogeneous oxidation of organic substrates comprising contacting the organic substrate with such POMs.

Abstract: The invention relates to polyoxometalates represented by the formula (An)m+ [M13X8RqOy]m? or solvates thereof, wherein A represents a cation, n is the number of the cations, m is the charge of the polyanion, M represents a transition metal selected from Pd, Pt, Au, Rh, Ir and mixtures thereof, X represents a heteroatom selected from As, Sb, Bi, P, Si, Ge, B, Al, Ga, S, Se, Te and mixtures thereof, and y is the number of oxygen atoms ranging from 32 to 40, a process for their preparation and their use for the catalytic oxidation of organic molecules.

Abstract: The present invention includes an electrochemical redox active material. The electrochemical redox active material includes a cocrystalline metallic compound having a general formula AxMO4-yXOy.M?O, where A is at least one metallic element selected from a group consisting of alkali metals, M and M? may be identical or different and independently of one another at least one selected from a group consisting of transition metals and semimetals, X is P or As, 0.9?x?1.1, and 0<y<4.

Abstract: An anode in a Direct Carbon Fuel Cell (DCFC) operating in a temperature range between 500 and 1200 degrees Celsius is provided. The anode material has high catalytic activity and selectivity for carbon oxidation, sufficient oxygen non-stoichiometry, rapid oxygen chemical diffusion, wide thermodynamic stability window to withstand reducing environment, sufficient electronic conductivity and tolerance to sulfur and CO2 environments. The anode has doped ruthenate compositions A1?xA?xRuO3, AB1?yRuyO3, or A1?xA?xB1?yRuyO3. A and A? may be divalent, trivalent, or tetravalent cation, and B is a multivalent cation. A is among lanthanide series elements La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Er or Yb, and dopant A? is from Group IIA, IIIB, or IVB elements. The doped ruthenates can also be a (AB1?yRuyO3) structure or an ordered Ruddlesden-Popper series ((A1?xAx?)n+1(B1?yRuy)nO3n+1) structure where n=1 or 2. The dopant B is among Group IVB, VB, VIB, VIII, IB, and IIB elements.

Abstract: A process for preparing As4O6 comprises successively heating and cooling a mixture of natural Sinsuk and 40% alcohol in a ratio of about 1: about 1 for about 1 to about 2 hour(s) resulting in a product, successively washing the product with distilled water thereby forming washed precipitates, maintaining the washed precipitates at about ?40° C. for 24 hours, defrosting, filtering, and drying the precipitates, and successively heating and cooling the precipitates to obtain the final As4O6 product.

Abstract: Improved solid acid electrolyte materials, methods of synthesizing such materials, and electrochemical devices incorporating such materials are provided. The stable electrolyte material comprises a solid acid in a eulytine structure capable of undergoing rotational disorder of oxyanion groups and capable of extended operation at elevated temperatures, that is, solid acids having hydrogen bonded anion groups; a superprotonic disordered phase; and capable of operating at temperatures of ˜100° C. and higher.

Abstract: The present invention provides a novel solid state method for the synthesis of lithium meta arsenite (LiAsO2) by mixing a lithium source with arsenious trioxide under controlled conditions to obtain the lithium meta arsenite.

Abstract: The present invention provides a method of forming inorganic pigments using one or more metal alloys. Metal alloys used in the method of the invention are preferably milled to a mean particle size of less than about 10 microns, may be mixed with other metal oxides, and calcined in the presence of oxygen in a rotary kiln. Inorganic pigments formed in accordance with the method of the invention can be used in a wide variety of applications, including the coloration of glass matrixes, ceramic bodies, polymers, and paints.

Abstract: A method for the remediation of arsenic is presented, comprising providing an aqueous solution of inorganic arsenic species, and passing the solution of inorganic arsenic species over a substrate comprising zero valent iron under anaerobic conditions, thereby reducing the arsenic species and forming arsenic-metal co-precipitates. Preferably, the metal is iron in the form of iron filings, and a source of sulfate ions is also present, resulting in the precipitation of arseno-pyrites.

Abstract: In a method for the remediation of inorganic arsenic species, a solution of inorganic arsenic is passed over zero valent iron under abiotic and anaerobic conditions, thereby removing the inorganic arsenic species and forming arsenic-metal co-precipitates. The metal is preferably in the form of iron filings, and is provided together with sand.

Abstract: Arsenic and TOC are removed from drinking water or wastewaters by use of finely-divided metallic iron in the presence of powdered elemental sulfur or other sulfur compounds such as manganese sulfide, followed by an oxidation step. A premix may be produced for this process, by adding the iron, sulfur and oxidizing agent to water in a predetermined pH range. The iron and sulfur are mixed for a period of time dependent upon the temperature and pH of the water and the presence of complexing or sequestering minerals and organic acids in the water. An oxidizing agent is added to the mixture and agitating is continued. In a preferred embodiment the oxidizing agent is hydrogen peroxide. Water is decanted from the mixture after a sufficient reaction time, to produce a concentrated premix. This premix can be added to water intended for drinking or to industrial effluents containing toxic materials.

Abstract: Methods of making substantially phase-pure and thermally stable crystalline alumina compositions stabilized with an oxide of silicon, germanium, phosphorus, arsenic or a mixture thereof. Also provided are crystalline alumina compositions and catalyst supports made using these methods.

Abstract: New thermally- and hydrothermally-stable .delta.-alumina compositions stabilized with an oxide of silicon, germanium, phosphorus, arsenic or a mixture thereof and methods of preparation of same are provided. Also provided are catalyst supports and catalysts made using these stabilized .delta.-alumina compositions, methods for making same, and methods for treating the exhaust gas from an internal combustion engine using such catalysts.

Abstract: Arsenic and TOC are removed from drinking water or wastewaters by use of finely-divided metallic iron in the presence of powdered elemental sulfur or other sulfur compounds such as manganese sulfide, followed by an oxidation step. A premix may be produced for this process, by adding the iron, sulfur and oxidizing agent to water in a predetermined pH range. The iron and sulfur are mixed for a period of time dependent upon the temperature and pH of the water and the presence of complexing or sequestering minerals and organic acids in the water. An oxidizing agent is added to the mixture and agitating is continued. In a preferred embodiment the oxidizing agent is hydrogen peroxide. Water is decanted from the mixture after a sufficient reaction time, to produce a concentrated premix. This premix can be added to water intended for drinking or to industrial effluents containing toxic materials.

Abstract: Anions of the formula (I):[DA.sub.5 M.sub.30-x O.sub.110-x (M'L).sub.x ].sup.m- (I)in which D is Na.sup.+, Ca.sup.2+ ; A is P, As, Sb, Si, Ge, or combinations thereof, M is W.sup.5+, W.sup.6+, or mixtures thereof; M' is a metallic element from groups 2 to 15 of the periodic table; other than W; L is O.sup.2-, OH.sup.-, H.sub.2 O; x is 0-10; and m is 10-20; selectively react with cations Z.sup.n+ to afford anions of the formula (II):[ZA.sub.5 M.sub.30-x O.sub.110-x (M'L).sub.x ].sup.(m+1-n)-(II)wherein n is 3 or 4; Z=Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, or Bi, when n=3, and Z=Ce, U, Np, Pu, or Am, when n =4. This reaction may be used for the selective encapsulation of lanthanide or actinide cations, and salts containing anions of formula (II) may be vitrified to form glasses or reduced to form tungsten "bronze" materials suitable for the long-term storage of radioactive lanthanides or actinides.

Abstract: Arsenic and TOC are removed from drinking water or wastewaters by use of finely-divided metallic iron in the presence of powdered elemental sulfur or other sulfur compounds such as manganese sulfide, followed by an oxidation step. A premix may be produced for this process, by adding the iron, sulfur and oxidizing agent to water in a predetermined pH range. The iron and sulfur are mixed for a period of time dependent upon the temperature and pH of the water and the presence of complexing or sequestering minerals and organic acids in the water. An oxidizing agent is added to the mixture and agitating is continued. In a preferred embodiment the oxidizing agent is hydrogen peroxide. Water is decanted from the mixture after a sufficient reaction time, to produce a concentrated premix. This premix can be added to water intended for drinking or to industrial effluents containing toxic materials.

Abstract: Compounds that satisfy the general formula A.sub.1-Y.sup.4+ A.sub.Y.sup.1+ A.sub.Y.sup.3+ V.sub.2-X E.sub.X O.sub.7 exhibit isotropic NTE behavior above a temperature of about 100.degree. C. Y is from about 0.0 to about 0.4, and more preferably is about 0.2. X is from about 0.6 to about 1.4, and is more preferably about 1. Particularly suitable NTE compounds have X about 1 and Y about 0. A.sup.4+ is selected from the group consisting of Hf, Zr, Zr.sub.a M.sub.b, Hf.sub.a M.sub.b and mixtures thereof wherein a plus b equals one and M is selected from the group consisting of Ti, Ce, Th, U, Mo, W, Pb, Sn, Ge and Si. More preferably, A.sup.4+ is selected from the group consisting of Hf and Zr. A.sup.1+ is selected from the group consisting of the alkali earth metals, A.sup.3+ is selected from the group consisting of the rare earth metals, and E is selected from the group consisting of P and As. The NTE materials may be incorporated into compositions such as epoxy and ceramic compositions.

Abstract: Anions of the formula (I):[DA.sub.5 M.sub.30-x O.sub.110-x (M'L).sub.x ].sup.m- (I)in which D is Na.sup.+, Ca.sup.2+; A is P, As, Sb, Si, Ge, or combinations thereof M is W.sup.5+, W.sup.6.alpha., or mixtures thereof; M' is a metallic element from groups 2 to 15 of the periodic table; other than W; L is O.sup.2-, OH.sup.-, H.sub.2 O; x is 0-10; and m is 10-20; selectively react with cations Z.sup.n+ to afford anions of the formula (II):[ZA.sub.5 M.sub.30-x O.sub.110-x (M'L).sub.x ].sup.(m+1-n)- (II)wherein n is 3 or 4; Z=Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, or Bi, when n=3, and Z=Ce, U, Np, Pu, or Am, when n=4. This reaction may be used for the selective encapsultion of lanthanide or actinide cations, and salts containing anions of formula (II) may be vitrified to form glasses or reduced to form tungsten "bronze" materials suitable for the long-germ storage of radioactive lanthanides or actinides.

Abstract: A sol-gel process is disclosed for preparing MTiOXO.sub.4 when M is K, Rb, Tl and/or NH.sub.4 and X is P and/or As which involves dissolving suitable compounds of M, Ti and X in stoichiometic amounts in a suitable organic liquid, and then producing crystalline MTiOXO.sub.4 using procedures including hydrolysis, condensation, solidification and pyrolysis. Bulk material and films (e.g., films of KTP on a single crystal silicon substrate) may be produced. Compositions comprising films of said MTiOXO.sub.4 produced by this process are disclosed.

Abstract: The specification discloses a method for the treatment of particulate materials such as soils and sludges containing arsenic compounds which comprises contacting the material with a source of iron (III) ions and a source of magnesium (II) ions to stabilize the material against leaching of arsenic. A preferred source of iron (III) ions is iron (III) sulfate and a preferred source of magnesium (II) ions is magnesium oxide.

Abstract: Layered divalent metal pentavalent metallate, M(HAO.sub.4).sub.x (RAO.sub.3).sub.y (Z).sub.z wherein M is divalent metal, A is a pentavalent metal, e.g. phosphorus, R is a substituent group other than H or OH, e.g., phenyl, covalently bonded to A, x+y=1, y is greater than 0, z ranges from 0 to 2, inclusive, and Z is an intercalated moiety is prepared by contacting a source of divalent metal with a substituted phosphonic acid-type compound under hydrothermal conditions.

Abstract: A method of preparing copper arsenate compositions having unique advantges in lower cost and higher performance for use in preparing chromated copper arsenate wood preserving formulations. These copper arsenate compositions are insoluble copper arsenate in water or as a dry reactive powder, have a mol ratio of As.sub.2 O.sub.5 to CuO of 1:4, and is readily soluble in chromic acid to form CCA wood preservatives. This copper arsenate is prepared by reacting suitable copper-bearing materials with arsenic trioxide and air or oxygen in ammoniacal solutions. Either or both of the starting raw materials, i.e., the copper and the arsenic, may be very impure, which impure materials were heretofore unsuitable for the production of copper arsenate.

Abstract: Layered divalent metal pentavalent metallate, M(HAO.sub.4).sub.x (RAO.sub.3).sub.y (Z).sub.z wherein M is divalent metal, A is a pentavalent metal, e.g. phosphorus, R is a substituent group other than H or OH, e.g., phenyl, covalently bonded to A, x+y=1, y is greater than O, z ranges from 0 to 2, inclusive, and Z is an intercalated moiety is prepared by contacting a source of divalent metal with a substituted phosphonic acid-type compound under hydrothermal conditions.

Abstract: Molecular sieve compositions having three-dimensional microporous framework structures of AsO.sub.2, AlO.sub.2 and PO.sub.2 tetrahedral oxide units are disclosed. These molecular sieves have an empirical chemical composition on an anhydrous basis expressed by the formula:mR: (As.sub.x Al.sub.y P.sub.z)O.sub.2wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present per mole of (As.sub.x Al.sub.y P.sub.z)O.sub.2 ; and "x", "y" and "z" represent the mole fractions of arsenic, aluminum and phosphorus, respectively, present as tetrahedral oxides. Their use as adsorbents, catalysts, etc. is also disclosed.

Abstract: A method for synthesizing a crystalline silicophosphoaluminate is provided. The composition has ion-exchange properties and is readily convertible to catalytically active material. The synthesis method requires an organic phase, and an aqueous phase. The silicon, phosphorus and aluminum components of the silicophosphoaluminate may, optionally, be replaced with other elements in the plus 4, 5 and 3 valence states, respectively.

Abstract: The invention relates to a method for purifying aqueous solutions containing at least one impurity element from the group consisting of arsenic, phosphorus, mercury and other heavy metals and solid matter by precipitation in at least two stages with the aid of precipitation reagents possessing ions capable of forming not-readily dissolved hydroxide precipitate. In accordance with the invention the main part of the precipitation reagent is introduced to the stage or stages following the first stage. The impurity element-containing precipitate formed in the aqueous solution subsequent to adding the reagent is separated therefrom substantially completely, and is returned so as to be present in the first precipitation stage, while that part of the solution which has been freed from precipitate in a later stage is withdrawn from the system. Substantially all the impurity element amount present in the ingoing aqueous solution are separated therefrom in the form of a sludge prior to the second precipitation stage.

Abstract: Compositions conforming to the formula A.sub.x.sup.++ B.sub.y.sup.+++ (OH).sub.2x+3y-nz D.sub.z.sup.n-.tH.sub.2 O wherein A is a divalent metal, B is a trivalent metal, D is a polyanion, x, y, z and t are numbers greater than zero and n is a whole number preferably from 1 to 10 and the ratio of x:y is equal to or greater than 0.5 and less than or equal to 10 and a method for preparing said compositions are described.

Abstract: A method of removal of arsenic from an acidic solution, in which ferrous ions contained in the solution are oxidized in the presence of high pressured oxygen and sulfuric acid to ferric ions, the solution with said ferric ions being mixed with the solution which has not subjected to oxidation, and the mixture of said solutions being controlled of its pH whereby ferric hydroxide is precipitated, which coprecipitates and adsorbs arsenic thereto.

Abstract: A gas mixer is disclosed which is used for mixing different gases in order to obtain a solid by sublimation or chemical reaction. The mixing is carried out in a mixing chamber having a uniform, substantially circular, cross section and a length depending on the particular application. Build up of the solid is prevented by injecting the gases to be mixed into the mixing chamber so that the combined flow in the duct, at its inception, is characterized by an axial flow of one gas surrounded by a spiralling flow of another gas. Thus, the gases to be mixed will first meet in the vicinity of the center of the duct at what may be termed a shear layer and the shear layer will progressively spread outwardly to the mixer surfaces downstream of the point of injection of the gases into the mixing chamber. The bulk of the solid formation in the duct is in the vicinity of the center of the duct which prevents the formation of solid on or near the mixer surfaces where it would tend to adhere or deposit and cause build ups.

Abstract: Method for production of a zeolitic material represented by the formula:R.sub.x H.sub.5.sub.-x (Al.sub.y Fe.sub.1.sub.-y).sub.4 (P.sub.l As.sub.1.sub.-l).sub.3 O.sub.16.zH.sub.2 Owherein R represents Na or K, x, y, z and l are numerical values of O.ltoreq.x.ltoreq.5, O.ltoreq.y.ltoreq.1, Z.ltoreq.9 and O.ltoreq.l.ltoreq.1, respectively; which comprises preparing an aqueous solution by dissolving (1) at least one source of aluminum and iron, (2) at least one source of phosphorus and arsenic and (3) at least one source of sodium and potassium in water in the ranges expressed in terms of the molar ratios of their oxides of3.5.ltoreq.(Al, Fe).sub. 2 O.sub.3 /(P, As).sub. 2 O.sub.5 .ltoreq.4.5and(K, Na).sub.2 O/(Al, Fe) .sub.2 O.sub.3 >0.12adjusting the pH of the solution to within the range of the cross-hatched area in FIGS. 1 to 4 and heating the solution at 150 to 250.degree.C in a closed vessel to crystallize the zeolitic material and recovering the objective zeolitic material.