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Strunzite

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Strunzite
Strunzite from Bavaria, Germany
General
CategoryMineral
Formula
(repeating unit)
Mn2+Fe3+2(PO4)2(OH)2 · 6H2O[1]
IMA symbolSnz[2]
Strunz classification8.DC.25
Crystal systemTriclinic
Space groupP1 (no. 2)
Unit cella = 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
ColorStraw yellow to brownish yellow
Crystal habitAcicular[4]
Mohs scale hardness4
Lustervitreous
Streakwhite
Specific gravity2.52
Density2.52 g/cm3
PleochroismWeak
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]

References

[edit]
  1. ^ "Strunzite R050619". RRUFF. Retrieved 8 April 2020.
  2. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  3. ^ "Strunzite Mn2+Fe3+2(PO4)2(OH)2•6H2O" (PDF). Handbook of Mineralogy. Retrieved 8 April 2020.
  4. ^ "General Strunzite Information". WebMineral. Retrieved 8 April 2020.
  5. ^ a b c "Strunzite". Mindat.org. Retrieved 8 April 2020.
  6. ^ Grey, I. E.; Macrae, C. M.; Keck, E.; Birch, W. D. (October 2012). "Aluminium-bearing strunzite derived from jahnsite at the Hagendorf-Süd pegmatite, Germany". Mineralogical Magazine. 76 (5): 1165–1174. Bibcode:2012MinM...76.1165G. doi:10.1180/minmag.2012.076.5.08. S2CID 101655747.
  7. ^ "Strunzite". Dakota Matrix Minerals. Retrieved 8 April 2020.