Formula: Ba(Fe,Mn,Mg)2Al2(PO4)3(OH)3
Origin of name: For Alan Kulan, Canadian discoverer of mineral
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 9.03 Ǻ, b = 12.12 Ǻ, c = 4.94 Ǻ, β = 100.3°
Colour: Blue-green
Diaphaneity:
Luster:
Habit: Plates, rosette-like aggregates
Hardness: 4
Specific gravity: 3.91
Cleavage: 2; {010} and {100} fair to good
Tenacity:
Streak:
Synonyms/varieties:
Comments: Series with penikisite
| 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 |