Formula: Ba2(Fe,Mn)(VO4)2(OH)
Origin of name: Locality; Gamagara ridge, Postmasburg Dist., South Africa
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Dark brown to nearly black
Diaphaneity:
Luster: Adamantine
Habit: Crystals prismatic, flattened, indistinct; aggregates of needles
Hardness: 4.5 to 5
Specific gravity: 4.62
Cleavage: 3; {001} and {100} distinct; {-101} indistinct
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 |