| Iranite | |
| Category: | Silicate mineral |
| Formula: | Pb10Cu(CrO4)6(SiO4)2(F,OH)2 |
| Imasymbol: | Irn[1] |
| Strunz: | 7.FC.15 |
| Symmetry: | Triclinic pedial H-M symbol: (1) Space group: P1 |
| Unit Cell: | a = 10.02 Å, b = 9.54 Å, c = 9.89 Å; α = 104.5°, β = 66°, γ = 108.5°; Z = 1 |
| Color: | Brown to orange |
| Habit: | Equant to flattened euhedral crystals |
| System: | Triclinic |
| Mohs: | 3 |
| Luster: | Vitreous |
| Streak: | Yellow |
| Gravity: | 5.8 |
| Opticalprop: | Biaxial |
| Refractive: | nα = 2.250 – 2.300 nγ = 2.400 – 2.500 |
| Birefringence: | δ = 0.150 – 0.200 |
| References: | [2] |
Iranite (Persian: ایرانیت) is a triclinic lead copper chromate silicate mineral with formula Pb10Cu(CrO4)6(SiO4)2(F,OH)2. It was first described from an occurrence in Iran. It is the copper analogue of hemihedrite (Pb10Zn(CrO4)6(SiO4)2(F,OH)2).[3]
It occurs as an oxidation product of hydrothermal lead-bearing veins. Associated minerals include dioptase, fornacite, wulfenite, mimetite, cerussite and diaboleite.[4] It was first described in 1970 for an occurrence in the Sebarz Mine, northeast of Anarak, Iran.[3] [4]