Formula: NaCa2Mn5Fe(AsO4)6 . 2H2O
Origin of name: After locality; Grischun (Graubünden), Switzerland
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Reddish-brown
Diaphaneity:
Luster: Vitreous
Habit: Crystals lath-like to 1 mm; anhedral grains
Hardness: 5
Specific gravity: 3.8
Cleavage: None
Tenacity:
Streak: Yellow red to yellow-brown
Synonyms/varieties:
Comments: Isostructural with wicksite
| 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 |