Formula: Cu5Zn5(As,Sb)2P8(OH)14
Origin of name: for Nicholas J. Theis, American geologist, Bendix Corp., who discovered the original sample
Crystal system: Orthorhombic (probable), pseudohexagonal
Crystal class: Unknown
Twinning:
Unit cell: a = 8.225, b = 7.123, c = 14.97
Colour: Greenish blue, turquoise-blue, pale turquoise-green, pale emerald-green
Diaphaneity: Semitransparent
Luster: Pearly on cleavages
Habit: cleavage plates, to 2 mm, usually curved or crumpled, to 2 mm, lamellar, in spherical aggregates and crusts
Hardness: 1.5
Specific gravity: 4.3
Cleavage: 1; {001} perfect
Tenacity: Sectile
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 |