Crystal structure of rustumite


RUSTUMITE was first described by Agrell1 as Ca4Si2O7(OH)2, space group Cc or C2/c, a = 7.62(5), b=18.55(5), c = 15.51(5)Å, β = 104°20′(10′), with Z = 10. The crystal structure we describe here, in space group C2/c (R = 11.3% for all data) gives, instead, an ideal formula Ca10(Si2O7)2SiO4Cl2(OH)2, with Z = 4. The important features of the completed structure are the presence of chlorine and of orthosilicate groups in addition to Si2O7 groups.


  1. 1

    Agrell, S. O. Min Mag. 34, 1–15 (1965).

  2. 2

    Ilyukhin, V. V. Direct and Patterson Methods for Solving Crystal Structures (in Russian, Institute of Applied Physics, Academy of Science (Moldavia), U.S.S.R., Kishinev, 1972).

  3. 3

    Kuz'min, E. A., Ilyukhin, V. V. & Petrunina, A. A. The Method of Vector Sub-Systems (in Russian, Institute of Geochemistry and Mineral Physics, Academy of Science (Ukraine), U.S.S.R., Kiev, 1976).

Download references

Author information



Rights and permissions

Reprints and Permissions

About this article

Cite this article

HOWIE, R., ILYUKHIN, V. Crystal structure of rustumite. Nature 269, 231 (1977).

Download citation

Further reading


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.