Formula: Ca5Si2O7(CO3)2
Origin of name: for C. Tilley, British petrologist
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 15.025, b = 10.269, c = 7.628, β = 105.833°
Colour: colourless, white
Diaphaneity: translucent to transparent
Luster: dull
Habit: irregular plates, rounded plates, massive
Hardness:
Specific gravity: 2.84
Cleavage: 3; {100} and probably {20-1} perfect, {100} good, {101} poor
Tenacity:
Streak: white
Synonyms/varieties:
Comments:
| Back to Alphabetical list | Colour photos | Optical properties/Thin sections | SEM images | TEM images | vibrational spectra description | IR spectra | Raman spectra | N-IR spectra | F-IR spectra | IES spectra |