Minerals and Metals in Ancient India v2.c47.177
Minerals and Metals in Ancient India v2.c47.177
- Language
- English
v2.c47.177
This is a complex sub-silicate of boron and aluminium, with either Mg, Fe or alkali metals (and sometimes fluorine) present. The formula has been variously claimed as H₉Al₃(B.OH)₂Si₄O₁₉ or 4R₆Al₂(SiO₄)₃.R₆Al₁₂(B₂O₅)₃. The composition is still uncertain.