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Defernite
Year of discovery: 1978 (Güneyce-Ikizdere, Turkey)
Locality list:
- Ca6(CO3)1.58(Si2O7)0.21(OH)7[Cl0.50(OH)0.08(H2O)0.42]
- [Ca2+6][(Cl0.50(OH)0.08(H2O)0.42|(OH)7|(CO3)1.58|(Si2O7)0.21]12-
- Color: Colorless, Reddish brown
- Streak: White, Pink
- Luster: Sub-Vitreous, Waxy
- Diaphaneity: Transparent
- Cleavage: Perfect on {010} (1 plane), Distinct on {100} (1 plane)
- Hardness: 3
- Density: 2.3-2.5
- System: Orthorhombic
- Group: mmm, Pnma
- Lattice: a=17.9, b=22.8, c=3.7