Abstract: The glass ceramic material of the present invention has the following composition, in weight percent,:About 20 to about 60 percent of silicon dioxide SiO.sub.2,about 5 to about 40 percent of phosphorus pentoxide P.sub.2 O.sub.5,about 2.7 to about 20 percent of sodium oxide Na.sub.2 O,about 0.4 to about 20 percent of potassium oxide K.sub.2 O,about 2.9 to about 30 percent of magnesium oxide MgO, andAbout 5 to about 40 percent of calcium oxide CaO,and may contain betweenAbout 0.5 and about 3.0 percent of fluorine.The glass ceramic material is produced by melting the mixture of components and subjecting the resulting melt to a specific annealing or tempering treatment to cause formation of nuclei and ceramization. Such glass ceramic material is especially useful as bone and tooth replacement material in humans and animals.

Abstract: An inorganic vitreous detector material which in principle is composed of the three-component system consisting of metaphosphoric acid, aluminum metaphosphate, and zinc oxide, is used for the determination of the energy of particles of high energy. Such a material may additionally contain silicon dioxide and boron trioxide.

Abstract: A radio-photoluminescence dosimeter glass of low energy dependence, high sensitivity, and good resistance to weathering is composed of an activating silver compound such as silver metaphosphate and at least one metal fluoride, preferably of metals of groups I, II, III, and/or IV of the Periodic System. Such a glass may contain at least one further metal oxide, preferably an oxide of metals of groups I, II, and/or III of the periodic System, phosphorus pentoxide, and, if desired, nitrogen pentoxide.

Abstract: An inorganic vitreous detector material which in principle is composed of the three-component system consisting of metaphosphoric acid, aluminum metaphosphate, and zinc oxide, is used for the determination of the energy of particles of high energy. Such a material may additionally contain silicon dioxide and boron trioxide.