Atomistry » Aluminium » Chemical properties » Topaz
Atomistry »
  Aluminium »
    Chemical properties »
      Topaz »

Topaz, Al2(SiO4)F2

Topaz, Al2(SiO4)F2, is a fluosilicate of aluminium. It is an orthorhombic mineral (a:b:c = 0.528:1:0.477), and its hardness (8), high refractive index, and variety of colour render it valuable as a gem-stone. The usual colour is pale yellow, but light brown, dark brown, and pale blue crystals are also found.

Last articles

Zn in 7VD8
Zn in 7V1R
Zn in 7V1Q
Zn in 7VPF
Zn in 7T85
Zn in 7T5F
Zn in 7NF9
Zn in 7M4M
Zn in 7M4O
Zn in 7M4N
© Copyright 2008-2020 by
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy