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Bismuth Orthosilicate, 2Bi2O3.3SiO2

Bismuth Orthosilicate, 2Bi2O3.3SiO2, is found in nature in the minerals eulytite and agricolite, the former crystallising in the tetrahedral system and the latter in the monoclinic. Thermal and microscopical examination of mixtures of bismuth trioxide and silica revealed the existence of several silicates which have since been synthesised. These are indicated below.

Formula.M.pt. (° C.).Density (20° C.).
Bi2O3.8SiO29926.623
Bi2O3.3SiO28478.107
Bi2O3.2SiO28738.657
2Bi2O3.3SiO2736 to 8778.984
Bi2O3.SiO2772 to 8908.924
3Bi2O3.2SiO27918.388
2Bi2O3.SiO2803 to 8439.138
3Bi2O3.SiO28228.897
10Bi2O3.SiO28329.136

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