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Kamarizaite, Fe 3+3 (AsO4)2(OH)3 · 3H2O, a new mineral species, arsenate analogue of tinticite

  • New Minerals, Nomenclature, and Classification
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Abstract

Kamarizaite, a new mineral species, has been identified in the dump of the Kamariza Mine, Lavrion mining district, Attica Region, Greece, in association with goethite, scorodite, and jarosite. It was named after type locality. Kamarizaite occurs as fine-grained monomineralic aggregates (up to 3 cm across) composed of platy crystals up to 1 μm in size and submicron kidney-shaped segregations. The new mineral is yellow to beige, with light yellow streak. The Mohs hardness is about 3. No cleavage is observed. The density measured by hydrostatic weighing is 3.16(1) g/cm3, and the calculated density is 3.12 g/cm3. The wavenumbers of absorption bands in the IR spectrum of kamarizaite are (cm−1; s is strong band, w is weak band): 3552, 3315s, 3115, 1650w, 1620w, 1089, 911s, 888s, 870, 835s, 808s, 614w, 540, 500, 478, 429. According to TG and IR data, complete dehydration and dehydroxylation in vacuum (with a weight loss of 15.3(1)%) occurs in the temperature range 110–420°C. Mössbauer data indicate that all iron in kamarizaite is octahedrally coordinated Fe3+. Kamarizaite is optically biaxial, positive: n min = 1.825, n max = 1.835, n mean = 1.83(1) (for a fine-grained aggregate). The chemical composition of kamarizaite (electron microprobe, average of four point analyses) is as follows, wt %: 0.35 CaO, 41.78 Fe2O3, 39.89 As2O5, 1.49 SO3, 15.3 H2O (from TG data); the total is 98.81. The empirical formula calculated on the basis of (AsO4,SO4)2 is Ca0.03Fe 3+2.86 (AsO4)1.90(SO4)0.10(OH)2.74 · 3.27H2O. The idealized formula is Fe 3+3 (AsO4)2(OH)3 · 3H2O. Kamarizaite is an arsenate analogue of orthorhombic tinticite, space group Pccm, Pcc2, Pcmm, Pcm21, or Pc2m; a = 21.32(1), b = 13.666(6), c =15.80(1) Å, V= 4603.29(5) Å3, Z= 16. The strongest reflections of the X-ray powder diffraction pattern [\( \bar d \), Å (I, %) (hkl)] are: 6.61 (37) (112, 120), 5.85 (52) (311), 3.947 (100) (004, 032, 511), 3.396 (37) (133, 431), 3.332 (60) (314), 3.085 (58) (621, 414, 324). The type material of kamarizaite is deposited in the Mineralogical Collection of Technische Universität Bergakademie Freiberg, Germany, inventory number 82199.

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References

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia

    N. V. Chukanov

  2. Faculty of Geology, Moscow State University, Moscow, 119991, Russia

    I. V. Pekov

  3. Alpha-Geophysik, Neudorferstrasse 18, Gotthelffriedrichsgrund, 09629, Germany

    S. Möckel

  4. Institute of Experimental Mineralogy, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia

    A. A. Mukhanova

  5. Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskii pr. 18-2, Moscow, 119071, Russia

    D. I. Belakovsky

  6. Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 119017, Russia

    L. A. Levitskaya

  7. Institute of Geological Science, ul. Kabanbai Batyra 69, Almaty, 050010, Kazakhstan

    G. K. Bekenova

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  1. N. V. Chukanov
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  2. I. V. Pekov
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  3. S. Möckel
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  4. A. A. Mukhanova
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  5. D. I. Belakovsky
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  6. L. A. Levitskaya
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  7. G. K. Bekenova
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Correspondence to N. V. Chukanov.

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Original Russian Text © N.V. Chukanov, I.V. Pekov, S. Möckel, A.A. Mukhanova, D.I. Belakovsky, L.A. Levitskaya, G.K. Bekenova, 2009, published in Zapiski RMO (Proceedings of the Russian Mineralogical Society), 2009, No. 3, pp. 100–108.

Approved by the Commission on New Minerals and Mineral Names, International Mineralogical Association July 1, 2008.

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Chukanov, N.V., Pekov, I.V., Möckel, S. et al. Kamarizaite, Fe 3+3 (AsO4)2(OH)3 · 3H2O, a new mineral species, arsenate analogue of tinticite. Geol. Ore Deposits 52, 599–605 (2010). https://doi.org/10.1134/S1075701510070093

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