Strashimirite

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Strashimirite
Strashimirite-88588.jpg
General
CategoryArsenate mineral
Formula
(repeating unit)		Cu8(AsO4)4(OH)4·5(H2O)
IMA symbolSsh[1]
Strunz classification8.DC.12 (10 ed)
7/D.07-20 (8 ed)
Dana classification42.6.5.1
Crystal systemMonoclinic
Unknown space group
Space groupP2/m, P2, or Pm
Unit cella = 9.71 Å, b = 18.81 Å
c = 8.94 Å; β = 97.2°; Z = 3
Identification
ColorWhite, pale green
Crystal habitElongated, tabular crystals; crusts; radiating aggregates
CleavageParting at right angle to elongation
Mohs scale hardness2.5 - 3
LusterGreasy, pearly
DiaphaneitySemitransparent
Specific gravity3.67 (calculated)
Optical propertiesBiaxial (-)
Refractive indexnα = 1.726 nγ = 1.747
Birefringenceδ = 0.021
PleochroismWeak; Y = very pale yellowish green; Z = yellowish green
2V angle70°
References[2][3][4][5][6]

Strashimirite (IMA symbol: Ssh[7]) is a rare monoclinic mineral containing arsenic, copper, hydrogen, and oxygen. It has the chemical formula Cu8(AsO4)4(OH)4·5(H2O).[8][9]

This mineral was discovered in Zapachitsa (Zapacica) copper deposit, Svoge, Sofia Oblast, Bulgaria in 1960, by the Bulgarian mineralogist .[10] She named the mineral after (1892-1960), Professor in Mineralogy and Petrography at Sofia University "St Kliment Ohridski", Bulgaria.[11] The International Mineralogical Association approved it as a new mineral in 1968.[12]

It occurs as a secondary mineral phase in the oxidation zone of copper arsenide deposits. It occurs associated with tyrolite, cornwallite, clinoclase, euchroite, olivenite, , , arthurite, metazeunerite, chalcophyllite, cyanotrichite, scorodite, pharmacosiderite, brochantite, azurite, malachite and chrysocolla.[2]

Although it remains quite rare, strashimirite has subsequently been identified in a number of locations including: Novoveska Huta in the Czech Republic; on the west flank of Cherbadung (Pizzo Cervandone), Binntal, Valais, Switzerland; in Kamsdorf and Saalfeld, Thuringia, Germany; the Clara mine, near Oberwolfach, Black Forest, Germany; in the Richelsdorf Mountains, Hesse, Germany; Cap Garonne mine, near le Pradet, Var, and Triembach-au-Val, Haut-Rhin, France; Wheals Gorland and Unity, Gwennap, Cornwall, England; the Tynagh mine, near Loughrea, Co. Galway, Ireland; the Majuba Hill mine, Antelope district, Pershing Co. Nevada, US; and the Centennial Eureka mine, Tintic district, Juab Co., Utah, US.[2]

See also[]

List of minerals named after people

Notes[]

  1. ^ 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.
  2. ^ a b c "Information page for Strashimirite" (PDF). Handbook of Mineralogy.
  3. ^ "Information page for Strashimirite". Mindat.
  4. ^ "Information page for Strashimirite". Webmineral.
  5. ^ "Information about Strashimirite". RRUFF Database.
  6. ^ "Strashimirite". Mineralienatlas Lexicon.
  7. ^ Warr, L.N. (2021). "IMA-CNMNC approved mineral symbols" (PDF). Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616. Retrieved 30 December 2021.
  8. ^ Mincheva-Stefanova, I. (1968). "Strashimirite - a new hydrous copper arsenate (In Russian)" (PDF). Zapiski RMO (Proceedings of the Russian Mineralogical Society) (97): 4.
  9. ^ Frost, Ray L.; Keeffe, Eloise C.; Cejka, Jiri; Sejkora, Jiri (2009). "Vibrational spectroscopic study of the arsenate mineral strashimirite Cu8(AsO4)4(OH)4.5H2O - relationship to other basic copper arsenates" (PDF). Vibrational Spectroscopy. 50 (2): 289–297. doi:10.1016/j.vibspec.2009.02.002.
  10. ^ Jordanka Minceva-Stefanova (Йорданка Минчева-Стефанова)(1923-2007)
  11. ^ Fleischer, Michael (1969). "New Mineral Names" (PDF). The American Mineralogist. 54: 1221.
  12. ^ Stoilova, D.; Minčeva-Stefanova, J (2001). "Infrared Spectroscopic Study of Strashimirite". Comptes Rendus de l'Académie Bulgare des Sciences. 54 (8): 49–52.

External links[]

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