Formula: (K,Ba)(Na,Ca)5(Mn,Fe,Mg)14Al(PO4)12(OH,F)2
Origin of name: For J. Dickenson, American collector
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Yellowish green to olive-green to brownish green
Diaphaneity: Transparent to translucent
Luster: Vitreous, pearly on cleavage
Habit: Crystals tabular, often pseudorhombohedral; foliated to micaceous, curved lamellar or radiated
Hardness: 3.5 to 4
Specific gravity: 3.41
Cleavage: 1; {001} perfect
Tenacity:
Streak: White
Synonyms/varieties:
Comments: Series with arrojadite
| 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 |