Abstract: Lead- and barium-free crystal glass for the manual or machine production of high-grade glass objects with a refractive index higher than 1.52 and a density of at least 2.45 g/cc, wherein the crystal glass comprises the following components in weight percent.
SiO2
59.0-71.0
TiO2
0.001-8.0
Al2O3
0.01-4.0
CaO
2.0-10.0
MgO
0.5-8.0
ZnO
0.01-11.0
K2O
0.08-11.0
Na2O
3.0-15.5
Sb2O3 or AS2O3
0.001-1.5
SrO
0.001-0.1
B2O3
0.01-3.0
Li2O
0.01-2.0
SO42−
0.0008-1.2
F−
0.008-0.2
as well as at least two components selected from the group consisting of Er2O3, Nd2O3, CeO2, CoO, Pr2O3, SeO, NiO and MnO and has a moisture content of 0.025 to 0.07% by weight.