Formula : SiO2
Family:
Space group:
Tetragonal - Trapezohedral HM symbol (4 2 2) Space Group: P 41212
Dana class:
75.1.1.1
High temperature:
Above approximately 1470C to the melting point of silica round 1713C.
Geological context:
Present in volcanic rocks, it form from molten rock at temperatures above approximately 1470 degrees Celsius to the melting point of silica (around 1713C)
Dernière mise à jour le 25.01.2021