Formula: Ca2BeSi2O7
Origin of name: From locality, Gugia, China
Crystal system: Tetragonal
Crystal class: -42m
Twinning:
Unit cell:
Colour: Colourless
Diaphaneity: Transparent
Luster: Vitreous
Habit: Crystals tabular
Hardness: 5
Specific gravity: 3.03
Cleavage: 3; {010} perfect, {001} distinct, {110} poor
Tenacity:
Streak:
Synonyms/varieties:
Comments: Dimorphous with jeffreyite
| Back to Alphabetical list | Colour photos | Thin sections | SEM images | TEM images | vibrational spectra description | IR spectra | Raman spectra | N-IR spectra | F-IR spectra | IES spectra |