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Lahnsteinite, Zn4(SO4)(OH)6 · 3H2O, a new mineral from the Friedrichssegen Mine, Germany

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Abstract

A new mineral, lahnsteinite, has been found in the dump of the Friedrichssegen Mine, Bad Ems district, Rhineland-Palatinate (Rheinland-Pfalz), Germany. Lahnsteinite, occurring as colorless tabular crystals in the cavities of goethite, is associated with pyromorphite, hydrozincite, quartz, and native copper. The Mohs’ hardness is 1.5; the cleavage is perfect parallel to (001). D calc = 2.995 g/cm3, D meas = 2.98(2) g/cm3. The IR spectrum is given. The new mineral is optically biaxial, negative, α = 1.568(2), β = 1.612(2), γ = 1.613(2), 2V meas = 18(3)°, 2V calc = 17°. The chemical composition (wt %, electron microprobe data; H2O was determined by gas chromatography of ignition products) is as follows: 3.87 FeO, 1.68 CuO, 57.85 ZnO, 15.83 SO3, 22.3 H2O, total is 101.53. The empirical formula is (Zn3.3Fe0.27Cu0.11)Σ3.91(S0.98O4)(OH)5 · 3H2.10O. The crystal structure has been studied on a single crystal. Lahnsteinite is triclinic, space group P1, a = 8.3125(6), b = 14.545(1), c = 18.504(2) Å, α = 89.71(1), β = 90.05(1), γ = 90.13(1)°, V = 2237.2(3) Å3, Z = 8. The strong reflections in the X-ray powder diffraction pattern [d, Å (I, %)] are: 9.30 (100), 4.175 (18), 3.476 (19), 3.290 (19), 2.723 (57), 2.624 (36), 2.503 (35), 1.574 (23). The mineral has been named after its type locality near the town of Lahnstein. The type specimen of lahnsteinite is deposited in the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, registration number 4252/1.

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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. Institute of Crystallography, Russian Academy of Sciences, Leninsky pr. 59, Moscow, 117333, Russia

    R. K. Rastsvetaeva & S. M. Aksenov

  3. Faculty of Geology, Moscow State University, Moscow, 119899, Russia

    I. V. Pekov

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

    D. I. Belakovskiy

  5. Merzbachstrasse 6, D-52249, Eschweiler, Germany

    G. Blass

  6. Wittemannstrasse 5, 65527, Niedernhausen, Germany

    G. Möhn

Authors
  1. N. V. Chukanov
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  2. R. K. Rastsvetaeva
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  3. S. M. Aksenov
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  4. I. V. Pekov
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  5. D. I. Belakovskiy
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  6. G. Blass
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  7. G. Möhn
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Correspondence to N. V. Chukanov.

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Original Russian Text © N.V. Chukanov, R.K. Rastsvetaeva, S.M. Aksenov, I.V. Pekov, D.I. Belakovskiy, G. Blass, G. Möhn, 2013, published in Zapiski Rossiiskogo Mineralogicheskogo Obshchestva, 2013, No. 1, pp. 39–46.

A new mineral, lahnsteinite, and its name were approved by the Commission on New Minerals, Nomenclature, and Mineral Classification of the International Mineralogical Association on April 2, 2012, IMA no. 2012-002

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Chukanov, N.V., Rastsvetaeva, R.K., Aksenov, S.M. et al. Lahnsteinite, Zn4(SO4)(OH)6 · 3H2O, a new mineral from the Friedrichssegen Mine, Germany. Geol. Ore Deposits 55, 663–668 (2013). https://doi.org/10.1134/S1075701513080023

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