Strunzite | |
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![]() Strunzite from Bavaria, Germany | |
General | |
Category | Mineral |
Formula (repeating unit) | Mn2+Fe3+2(PO4)2(OH)2 · 6H2O[1] |
IMA symbol | Snz[2] |
Strunz classification | 8.DC.25 |
Crystal system | Triclinic |
Space group | P1 (no. 2) |
Unit cell | a = 10.228(5) [Å], b = 9.837(5) [Å] c = 7.284(5) [Å]; α = 90.17(5)° β = 98.44(5)° γ = 117.44(5)°; Z = 2[3] |
Identification | |
Color | Straw yellow to brownish yellow |
Crystal habit | Acicular[4] |
Mohs scale hardness | 4 |
Luster | vitreous |
Streak | white |
Specific gravity | 2.52 |
Density | 2.52 g/cm3 |
Pleochroism | Weak |
References | [5][6] |
Strunzite (Mn2+Fe3+2(PO4)2(OH)2 · 6H2O) is a light yellow mineral of the strunzite group, first discovered in 1957.[5]
It crystallizes in the triclinic system and has a light, vitreous luster, a specific gravity of 2.52 and a Mohs hardness of 4. Associated minerals include beraunite, quartz and strengite.[5]
It is named after Hugo Strunz, a Professor of Mineralogy at Technische Universität Berlin.[7]
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