Coquimbit
Structural context
Coquimbite
Crystal System trigonalCrystal Class hexagonal scalenohedralSpace Group P-31c
Chemical context
Stoichiometric formulas
Coquimbite
mindat.org
- March 13, 2023AlFe3(SO4)6(H2O)12·6H2OFormerly given as Fe2-xAlx(SO4)3.9H2O (x ~0.5) or even Fe2(SO4)3.9H2O; redefined by IMA in 2019 (Al is essential)
IMA
- March 13, 2023AlFe3(SO4)6(H2O)12 · 6H2O
mineralogy.rocks
- Aug. 30, 2022AlFe3+3(SO4)6(H2O)12·6H2O
Physical properties
ColorColor entities, recognized using a custom trained NER model
- light violet
- greenish white
- bluish white
- yellowish white
- brownish white
Color noteOriginal color note from the source
Light violet to purple, greenish white, bluish white, yellowish white, brownish white
StreakStreak entities, recognized using a custom trained NER model
Streak noteOriginal streak note from the source
White
Lustre
Sub-Vitreous
Resinous
Waxy
Greasy
Fracture
Sub-Conchoidal
Transparency
Transparent
Tenacity
brittle
Hardness
2.5
Calculated density
2.12