Formula: Fe2(SO4)3.9H2O
Origin of name: from Greek para = similar and coquimbite
Crystal system: hexagonal
Crystal class: -3
Twinning:
Unit cell:
Colour: pale violet
Diaphaneity: transparent
Luster: vitreous
Habit: crystals rhombohedral or equant, pseudocubic or prismatic, massive, granular
Hardness: 2.5
Specific gravity: 2.11
Cleavage: 2; {01-12} and {10-14} imperfect
Tenacity:
Streak:
Synonyms/varieties:
Comments: dimorphous with coquimbite
| 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 |