Formula: (Mn,Mg)Fe2Be2(PO4)4 . 6H2O
Origin of name: For J. Fahey, American geochemist
Crystal system: Hexagonal
Crystal class: 622
Twinning:
Unit cell:
Colour: White, bluish white, brownish white
Diaphaneity:
Luster:
Habit: Fibers in tufts, rosettes and botryoidal masses
Hardness:
Specific gravity: 2.66
Cleavage: 1; perfect, parallel to c-axis
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 |