Formula: ZnFe2(AsO4)2(OH)2
Origin of name: after Wilhelm Klein (1889-1939), former mine manager of the Otavi Mining and Railroad Company mines in Namibia (1916–1939), who made the first systematic collection of minerals from the Tsumeb mine.
Crystal system: Monoclinic
Crystal class: 2/m
Twinning: Interpenetration twins on {101}
Unit cell: a = 6.631, b = 7.611, c = 7.377, β = 91.79°
Colour: Blackish green
Diaphaneity: Translucent
Luster: Dull, adamantine on fractures
Habit: Euhedral crystals
Hardness: 4.5
Specific gravity: 4.34 - 4.63
Cleavage: {23-2} imperfect
Tenacity: Uneven fracture
Streak: Green
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 |