Physics and Chemistry of Minerals

, Volume 46, Issue 4, pp 417–425 | Cite as

Jouravskite: refined data on the crystal structure, chemical composition and spectroscopic properties

  • Nikita V. ChukanovEmail author
  • Natalia V. Zubkova
  • Leonid A. Pautov
  • Jörg Göttlicher
  • Anatoly V. Kasatkin
  • Konstantin V. Van
  • Dmitriy A. Ksenofontov
  • Igor V. Pekov
  • Svetlana A. Vozchikova
  • Dmitry Yu. Pushcharovsky
Original Paper


Refined data on the crystal structure, chemical composition and properties of jouravskite, ideally Ca3Mn4+(SO4)(CO3)(OH)6·12H2O, have been obtained on a sample from N’Chwaning 3 Mine, Kuruman, Kalahari manganese field, Northern Cape Province, South Africa. The chemical composition determined using a combination of different methods (including ICP-OES, gas chromatography of products of ignition and electron microprobe) is (wt%): CaO 25.88, SrO 0.19, BaO 0.23, B2O3 0.39, Fe2O3 1.01, MnO2 12.00, SiO2 0.06, CO2 6.8, SO3 12.44, H2O 41.8, total 100.80, which corresponds to the empirical formula (Z = 2): (Са2.98Sr0.01Ba0.01)Σ3.00(Mn4+0.89Fe3+0.08Si0.01)Σ0.98{(SO4)1.00(CO3)1.00[B(OH)4]0.07}Σ2.07(OH)5.78·11.94H2O. Tetravalent state of Mn was confirmed by Mn K-edge XANES spectroscopy. The IR spectrum of jouravskite contains characteristic bands of Mn4+(OH)6 octahedra, CO32− and SO42− anions, and H2O molecules. The crystal structure was determined using single-crystal X-ray diffraction data and refined to R = 0.0332. Jouravskite is isostructural with thaumasite. The parameters of the hexagonal (space group P63) unit cell are: a = 11.07129(14) Å, c = 10.62650(14) Å, V = 1128.02(3) Å3 and Z = 3. Investigation of other samples of ettringite-group minerals from N’Chwaning 3 Mine demonstrates wide variations of the contents of manganese, iron and boron, and possible existence of a Mn4+-dominant analogue of sturmanite with the presumed idealized formula Са6Mn4+2(SO4)2[B(OH)4](OH)10O2·nH2O.


Jouravskite Ettringite group Crystal structure Chemical composition IR spectroscopy XANES spectroscopy N’Chwaning 3 Mine 



This work was financially supported by the Russian Foundation for Basic Research, Grant no. 18-29-12007_mk.

Supplementary material

269_2018_1012_MOESM1_ESM.pdf (139 kb)
Supplementary material 1 (PDF 139 KB)
269_2018_1012_MOESM2_ESM.cif (17 kb)
Supplementary material 2 (CIF 16 KB)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Nikita V. Chukanov
    • 1
    • 2
    Email author
  • Natalia V. Zubkova
    • 2
  • Leonid A. Pautov
    • 3
  • Jörg Göttlicher
    • 4
  • Anatoly V. Kasatkin
    • 3
  • Konstantin V. Van
    • 5
  • Dmitriy A. Ksenofontov
    • 2
  • Igor V. Pekov
    • 2
  • Svetlana A. Vozchikova
    • 1
  • Dmitry Yu. Pushcharovsky
    • 2
  1. 1.Institute of Problems of Chemical PhysicsRussian Academy of SciencesChernogolovkaRussia
  2. 2.Faculty of GeologyMoscow State University, Vorobievy GoryMoscowRussia
  3. 3.Fersman Mineralogical Museum of Russian Academy of SciencesMoscowRussia
  4. 4.Karlsruhe Institute of Technology, Institute for Photon Science and Synchrotron Radiation (IPS)Eggenstein-LeopoldshafenGermany
  5. 5.Institute of Experimental MineralogyRussian Academy of SciencesChernogolovkaRussia

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