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Trigonal variation in the garnet supergroup: the crystal structure of nikmelnikovite, Ca12Fe2+Fe3+3Al3(SiO4)6(OH)20, from Kovdor massif, Kola Peninsula, Russia

Part of: Alkaline rocks - Gregory Yu. Ivanyuk memorial issue

Published online by Cambridge University Press:  28 June 2021

Sergey V. Krivovichev Open the ORCID record for Sergey V. Krivovichev [Opens in a new window] ,
Taras L. Panikorovskii ,
Victor N. Yakovenchuk ,
Ekaterina A. Selivanova  and
Gregory Yu. Ivanyuk
Sergey V. Krivovichev*
Affiliation:
Kola Science Centre, Russian Academy of Sciences, 14 Fersman Street, Apatity184200, Russia Department of Crystallography, St. Petersburg State University, 7/9 University Emb., St. Petersburg, 199034, Russia
Taras L. Panikorovskii
Affiliation:
Kola Science Centre, Russian Academy of Sciences, 14 Fersman Street, Apatity184200, Russia Department of Crystallography, St. Petersburg State University, 7/9 University Emb., St. Petersburg, 199034, Russia
Victor N. Yakovenchuk
Affiliation:
Kola Science Centre, Russian Academy of Sciences, 14 Fersman Street, Apatity184200, Russia
Ekaterina A. Selivanova
Affiliation:
Kola Science Centre, Russian Academy of Sciences, 14 Fersman Street, Apatity184200, Russia
Gregory Yu. Ivanyuk
Affiliation:
Kola Science Centre, Russian Academy of Sciences, 14 Fersman Street, Apatity184200, Russia
*
*Author for correspondence: Sergey V. Krivovichev, Email: [email protected]
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Abstract

The crystal structure of nikmelnikovite, Ca12Fe2+Fe3+3Al3(SiO4)6(OH)20, a new member of the garnet supergroup from Kovdor massif, Kola Peninsula, Russia (R$\bar{3}$, a = 17.2072(6), c = 10.5689(4) Å, V = 2710.1(2) Å3 and Z = 3) has been refined to R1 = 0.046 on the basis of 1184 unique observed reflections. Nikmelnikovite is the first mineral species in the garnet supergroup that has a trigonal (rhombohedral) symmetry. The relationship between its unit cell and the pseudocubic (ideal garnet) unit cell can be described by the transformation matrix [1$\bar{1}$0 | 01$\bar{1}$ | ½½½]. The crystal-chemical relations between the ideal Ia$\bar{3}$d garnet and the nikmelnikovite structure type can be described by the following series of imaginary modifications: (1) the symmetry is lowered according to the Ia$\bar{3}$d → R$\bar{3}$ group–subgroup relationship; (2) the cation sites are split according to the following sequences: X → {X1, X2}; Y → {Y1, Y2, Y3, Y4}; Z → {Z1, Z2}; (3) the X sites remain fully occupied by Ca; (4) each Y site is occupied predominantly by a distinct chemical species: Y1 → Al (Al site), Y2 → Fe2+ (Fe1 site), Y3 → Fe3+ (Fe2 site), Y4 → vacancy (Mn site); (5) one of the Z sites (Z1) is occupied by Si, whereas the other site (Z2) is predominantly vacant. The crystal-chemical formula that takes into account the transition between the archetype and the nikmelnikovite structure type can be described as X{Ca12}Y[Fe2+Al4Fe3+2□]Z(Si6□6)O24(OH)20□4. The structural complexity of nikmelnikovite (4.529 bit/atom and 434.431 bit/cell, after H-correction) is higher than those for andradite, grossular and katoite, which is typical for low-temperature minerals formed after primary minerals with simpler structures.

Keywords

garnetnikmelnikovitecrystal structureKovdorKola peninsulaRussian Arctic
Type
Article – Gregory Yu. Ivanyuk memorial issue
Information
Mineralogical Magazine , Volume 85 , Issue 4 , August 2021 , pp. 620 - 626
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press on behalf of The Mineralogical Society of Great Britain and Ireland

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Footnotes

†

Deceased

Associate Editor: Juraj Majzlan

References

Agilent Technologies (2014) CrysAlis CCD and CrysAlis RED. Oxford Diffraction Ltd, Yarnton, Oxfordshire.Google Scholar
Armbruster, T. and Geiger, C.A. (1993) Andradite crystal chemistry, dynamic X-site disorder and structural strain in silicate garnets. European Journal of Mineralogy, 5, 59–71.CrossRefGoogle Scholar
Bosi, F., Hatert, F., Hålenius, U., Pasero, M., Miyawaki, R. and Mills, S.J. (2019) On the application of the IMA-CNMNC dominant-valency rule to complex mineral compositions. Mineralogical Magazine, 83, 627–632.CrossRefGoogle Scholar
Frank-Kamenetskaya, O.V., Rozhdestvenskaya, L.V., Shtukenberg, A.G., Bannova, I.I. and Skalkina, Yu. A. (2007) Dissymmetrization of crystal structures of grossular-andradite garnets Ca3(Al,Fe)2(SiO4)3. Structural Chemistry, 18, 493–503.CrossRefGoogle Scholar
Geiger, C.A. and Armbruster, T. (1997) Mn3Al2Si3O12 spessartine and Ca3Al2Si3O12 grossular garnet: structural dynamic and thermodynamic properties. American Mineralogist, 82, 740–747.CrossRefGoogle Scholar
Geiger, C.A. and Rossman, G.R. (2018) IR spectroscopy and OH– in silicate garnet: The long quest to document the hydrogarnet substitution. American Mineralogist, 103, 384–393.CrossRefGoogle Scholar
Geiger, C.A. and Rossman, G.R. (2020a) Nano-size hydrogarnet clusters and proton ordering in calcium silicate garnet: Part I. The quest to understand the nature of “water” in garnet continues. American Mineralogist, 105, 455–467.CrossRefGoogle Scholar
Geiger, C.A. and Rossman, G.R. (2020b) Micro- and nano-size hydrogarnet clusters in calcium silicate garnet: Part II. Mineralogical, petrological and geochemical aspects. American Mineralogist, 105, 468–478.CrossRefGoogle Scholar
Grew, E.S., Locock, A.J., Mills, S.J., Galuskina, I.O., Galuskin, E.V. and Hålenius, U. (2013) Nomenclature of the garnet supergroup. American Mineralogist, 98, 785–811CrossRefGoogle Scholar
Ivanyuk, G.Yu., Yakovenchuk, V.N. and Pakhomovsky, Ya.A. (2002) Kovdor. Laplandia Minerals, Apatity, Russia. 320 pp.Google Scholar
Krivovichev, S.V. (2013) Structural complexity of minerals: information storage and processing in the mineral world. Mineralogical Magazine, 77, 275–326.CrossRefGoogle Scholar
Krivovichev, S.V., Krivovichev, V.G. and Hazen, R.M. (2018) Structural and chemical complexity of minerals: correlations and time evolution. European Journal of Mineralogy, 30, 231–236.CrossRefGoogle Scholar
Krivovichev, S.V., Yakovenchuk, V.N., Panikorovskii, T.L., Savchenko, E.E., Pakhomovsky, Ya.A., Mikhailova, Yu. A., Selivanova, E.A., Kadyrova, G.I. and Ivanyuk, G.Yu. (2019) Nikmelnikovite, Ca12Fe2+Fe3+3Al3(SiO4)6(OH)20: a new mineral from the Kovdor massif (Kola Peninsula, Russia). Doklady Earth Sciences, 488, 1200–1202.CrossRefGoogle Scholar
Lager, G.A., Armbruster, T., Rotella, F.J. and Rossman, G.R. (1989) OH substitution in garnets: X-ray and neutron diffraction, infrared, and geometric-modeling studies. American Mineralogist, 74, 840–851.Google Scholar
Moiseev, M.M., Panikorovskii, T.L., Aksenov, S.M., Mazur, A.S., Mikhailova, J.A., Yakovenchuk, V.N., Bazai, A.V., Ivanyuk, G.Y., Agakhanov, A.A., Shilovskikh, V.V., Pekov, I.V., Kasatkin, A.V., Rusakov, V.S., Yapaskurt, V.O., Karpenko, V.Y. and Krivovichev, S.V. (2020) Insights into crystal chemistry of the vesuvianite-group: manaevite-(Ce), a new mineral with complex mechanisms of its hydration. Physics and Chemistry of Minerals, 47, 1–14.CrossRefGoogle Scholar
Panikorovskii, T.L., Krivovichev, S.V., Galuskin, E.V., Shilovskikh, V.V., Mazur, A.S. and Bazai, A.V. (2016) Si-deficient, OH-substituted, boron-bearing vesuvianite from Sakha-Yakutia, Russia: a combined single-crystal, 1H MAS-NMR and IR spectroscopic study. European Journal of Mineralogy, 28, 931–941.CrossRefGoogle Scholar
Sacerdoti, M. and Passaglia, E. (1985) The crystal structure of katoite and implications within the hydrogrossular group of minerals. Bulletin de Mineralogie, 108, 1–8.CrossRefGoogle Scholar
Sheldrick, G.M. (2008) A short history of SHELX. Acta Crystallographica, A64, 112–122.CrossRefGoogle Scholar
Shtukenberg, A.G., Popov, D.Yu. and Punin, Yu.O. (2005) Growth ordering and anomalous birefringence in ugrandite garnets. Mineralogical Magazine, 69, 537–550.CrossRefGoogle Scholar
Tančić, P., Kremenović, A. and Vulić, P. (2020) Structural dissymmetrization of optically anisotropic Grs64±1Adr36±1Sps2 grandite from Meka Presedla (Kopaonik Mt., Serbia). Powder Diffraction, 35, 7–16.CrossRefGoogle Scholar
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