Formula: Cu18Al2(AsO4)3(SO4)3(OH)27 . 33H2O
Origin of name: From Greek for copper and leaf
Crystal system: Hexagonal
Crystal class: -3
Twinning:
Unit cell: a = 10.77 Ǻ, c = 57.5 Ǻ
Colour: Emerald-green, grass-green to bluish green
Diaphaneity:
Luster: Vitreous to adamantine
Habit: Crystals thin tabular, hexagonal outline, flattened; scaly, foliated masses; rosettes
Hardness:
Specific gravity: 2.67
Cleavage: 2; {0001} perfect, micaceous, {10-11} traces
Tenacity:
Streak:
Synonyms/varieties:
Comments:
| 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 |