Formula: MgAl2[OH|AsO4]2.8H2O
Origin of name: After the type locality in the Maghreb region of Morocco
Crystal system: Triclinic
Crystal class: 1
Twinning:
Unit cell: a = 5.436, b = 7.075, c = 10.5, α = 97.701°, β = 102.021°, γ = 110.295°
Colour: Colourless
Diaphaneity: Transparent
Luster: Vitreous
Habit: Prismatic on [001] to tabular on [010], with dominating {010}, (001} and {110} faces and minor {100} and {011} faces
Hardness:
Specific gravity:
Cleavage: 1; {010}, perfect
Tenacity:
Streak: White
Synonyms/varieties:
Comments: As analogue of gordonite
| 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 |