Physics and Chemistry of Minerals

, Volume 45, Issue 4, pp 361–366 | Cite as

Synthesis and crystal structure of chromium-bearing anhydrous wadsleyite

  • E. A. Sirotkina
  • L. Bindi
  • A. V. Bobrov
  • S. M. Aksenov
  • T. Irifune
Original Paper


A chromium-bearing wadsleyite (Cr-Wad) was synthesized in the model system Mg2SiO4–MgCr2O4 at 14 GPa and 1600 °C and studied from the chemical and structural point of views. Microprobe data gave the formula Mg1.930Cr0.120Si0.945O4, on the basis of 4 oxygen atoms. The crystal structure has been studied by single-crystal X-ray diffraction. The orthorhombic unit-cell parameters are: a = 5.6909(5) Å, b = 11.4640(10) Å, c = 8.2406(9) Å, V = 537.62(9) Å3, Z = 8. The structure, space group Imma, was refined to R 1 = 5.99% in anisotropic approximation using 1135 reflections with F o > 4σ(F o) and 43 parameters. Chromium was found to substitute for both Mg at the octahedral sites and Si at the tetrahedral site, according to the reaction VIMg2+ + IVSi4+ = VICr3+ + IVCr3+. On the whole, the structural topology is nearly identical to that of pure wadsleyite. The successful synthesis of Cr-Wad may be important for the thermobarometry of mantle phase associations.


Wadsleyite High-pressure experiments Single-crystal X-ray diffraction Chromium Earth’s mantle 



The research was supported by the Russian Science Foundation (project no. 17-17-01169 to AB and ES). Structural studies were partly supported by the Foundation of the President of the Russian Federation (grant no. MK-1277.2017.5 to ES).

Supplementary material

269_2017_926_MOESM1_ESM.cif (15 kb)
Supplementary material 1 (CIF 15 KB)


  1. Arai S (2010) Possible recycled origin for ultrahigh-pressure chromitites in ophiolites. J Miner Petrol Sci 105:280–285CrossRefGoogle Scholar
  2. Bindi L, Sirotkina EA, Bobrov AV, Irifune T (2015) Structural and chemical characterization of Mg[(Cr,Mg)(Si,Mg)]O4, a new post-spinel phase with sixfold-coordinated silicon. Am Miner 100:1633–1636CrossRefGoogle Scholar
  3. Bolfan-Casanova N, Muñoz M, McCammon C, Deloule E, Férot A, Demouchy S, France L, Andrault D, Pascarelli S (2012) Ferric iron and water incorporation in wadsleyite under hydrous and oxidizing conditions: a XANES, Mössbauer, and SIMS study. Am Miner 97:1483–1493CrossRefGoogle Scholar
  4. Dobrzhinetskaya L, Green HW, Wang S (1996) Alpe Arami: a peridotite massif from depths of more than 300 kilometers. Science 271:1841–1845CrossRefGoogle Scholar
  5. Dymshits AM, Litasov KD, Sharygin IS, Shatskiy A, Ohtani E, Suzuki A, Funakoshi K (2014) Thermal equation of state of majoritic knorringite and its significance for continental upper mantle. J Geophys Res Solid Earth 119:8034–8046CrossRefGoogle Scholar
  6. Griffin WL, Afonso JC, Belousova EA, Gain SE, Gong XH, Gonzalez-Jimenez JM, Satsukawa T (2016) Mantle recycling: transition zone metamorphism of Tibetan ophiolitic peridotites and its tectonic implications. J Petrol 57:655–684CrossRefGoogle Scholar
  7. Gudfinnsson GH, Wood BJ (1998) The effect of trace elements on the olivine–wadsleyite transformation. Am Miner 83:1037–1044CrossRefGoogle Scholar
  8. Harte B (2010) Diamond formation in the deep mantle: the record of mineral inclusions and their distribution in relation to mantle dehydration zones. Min Mag 74(2):189–215CrossRefGoogle Scholar
  9. Hazen RM, Weinberger MB, Yang H, Prewitt CT (2000) Comparative high-pressure crystal chemistry of wadsleyite, β-(Mg1–xFex)2SiO4, with x = 0 and 0.25. Am Miner 85(5–6):770–777CrossRefGoogle Scholar
  10. Ibers JA, Hamilton WC (eds) (1974) International tables for X-ray crystallography. vol. IV. The Kynoch Press, BirminghamGoogle Scholar
  11. Inoue T, Yurimoto Y, Kudoh T (1995) Hydrous modified spinel, Mg1.75SiH0.504: a new water reservoir in the mantle transition region. Geophys Res Lett 22:117–120CrossRefGoogle Scholar
  12. Irifune T, Kurio A, Sakamoto S, Inoue T, Sumiya H, Funakoshi K (2004) Formation of pure polycrystalline diamond by direct conversion of graphite at high pressure and high temperature. Phys Earth Planet Inter 143:593–600CrossRefGoogle Scholar
  13. Katsura T, Ito E (1989) The system Mg2SiO4–Fe2SiO4 at high pressure and temperatures: precise determination of stabilities of olivine, modified spinel and spinel. J Geophys Res 94:15663–15670CrossRefGoogle Scholar
  14. Oxford Diffraction (2009) CrysAlisPro. Oxford Diffraction Ltd, AbingdonGoogle Scholar
  15. Pushcharovsky DY, Pushcharovsky YM (2012) The mineralogy and the origin of deep geospheres: a review. Earth Sci Rev 113:94–109CrossRefGoogle Scholar
  16. Ringwood AE (1966) The chemical composition and origin of the earth. In: Hurley PM (ed) Advances in earth science. M.I.T. Press, Cambridge, pp 287–356Google Scholar
  17. Sheldrick GM (2008) A short history of SHELX. Acta Cryst Section A. Found Crystallography 64(1):112–122CrossRefGoogle Scholar
  18. Sirotkina EA, Bobrov AV, Bindi L, Irifune T (2015) Phase relations and formation of chromium‑rich phasesthe system Mg4Si4O12–Mg3Cr2Si3O12 at 10–24 GPa and 1,600 °C. Contrib Mineral Petrol 169:2. doi: 10.1007/s00410-014-1097-0 CrossRefGoogle Scholar
  19. Smyth JR, Bolfan-Casanova N, Avignant D, El-Ghozzi M, Himer SM (2014) Tetrahedral ferric iron in oxidized hydrous wadsleyite. Am Miner 99:458–466CrossRefGoogle Scholar
  20. Stalder R (2004) Influence of Fe, Cr and Al on hydrogen incorporation in orthopyroxene. Eur J Miner 16(5):703–711CrossRefGoogle Scholar
  21. Yamada A, Inoue T, Irifune T (2004) Melting of enstatite from 13 to 18 GPa under hydrous conditions. Phys Earth Planet Inter 147:45–56CrossRefGoogle Scholar
  22. Yufeng R, Fangyuan C, Jingsui Y, Yuanhong G (2008) Exsolutions of diopside and magnetite in olivine from mantle dunite, Luobusa ophiolite, Tibet, China. Acta Geol Sinica 82:377–384CrossRefGoogle Scholar
  23. Zhang RY, Shu JF, Mao HK, Liou JG (1999) Magnetite lamellae in olivine and clinohumite from Dabie UHP ultramafic rocks, central China. Am Miner 84(4):564–569CrossRefGoogle Scholar
  24. Zhang L, Smyth JR, Allaz J, Kawazoe T, Jacobsen SD, Jin Z (2016) Transition metals in the transition zone: crystal chemistry of minor element substitution in wadsleyite. Am Miner 101:2322–2330CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • E. A. Sirotkina
    • 1
    • 2
    • 3
  • L. Bindi
    • 4
    • 5
  • A. V. Bobrov
    • 1
    • 3
  • S. M. Aksenov
    • 1
    • 2
    • 6
  • T. Irifune
    • 7
    • 8
  1. 1.Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of SciencesMoscowRussia
  2. 2.Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics”Russian Academy of SciencesMoscowRussia
  3. 3.Geological FacultyMoscow State UniversityMoscowRussia
  4. 4.Dipartimento di Scienze della TerraUniversità di FirenzeFlorenceItaly
  5. 5.CNR, Istituto di Geoscienze e Georisorse, Sezione di FirenzeFlorenceItaly
  6. 6.Institute of Organoelement Compounds RASMoscowRussia
  7. 7.Geodynamics Research CenterEhime UniversityMatsuyamaJapan
  8. 8.Earth Life Science InstituteTokyo Institute of TechnologyTokyoJapan

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