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Cacoxenite
Year of discovery: 1825 (Hrbek mine, Czech), 1947 (Japan)
Locality list: 15 localities of cacoxenite
- Fe24AlO6(PO4)17(OH)12,75H2O
- [Fe3+24][Al3+][(OH)12|O6|(PO4)17]75-,75H2O
- Color: Yellow-Brown
- Streak: Pale Yellow
- Luster: Silky
- Diaphaneity: Translucent
- Habit: Acicular
- Aggregate: Globular
- Cleavage: No
- Hardness: 3-4
- Density: 2.2
- System: Hexagonal
- Group: 6/m, P63/m
- Lattice: a=27.6, c=10.7
Etymology: Kakoxenios (blunt) in Greek