Jump to ContentJump to Main Navigation
Show Summary Details
More options …

Zeitschrift für Kristallographie - Crystalline Materials

Editor-in-Chief: Pöttgen, Rainer

Ed. by Antipov, Evgeny / Boldyreva, Elena V. / Friese, Karen / Huppertz, Hubert / Jahn, Sandro / Tiekink, E. R. T.

12 Issues per year


IMPACT FACTOR 2017: 1.263
5-year IMPACT FACTOR: 2.057

CiteScore 2017: 2.65

Online
ISSN
2196-7105
See all formats and pricing
More options …
Ahead of print

Issues

The correct symmetry of the six-fold twin in β-Ca11B2Si4O22

Massimo Nespolo
Published Online: 2018-06-16 | DOI: https://doi.org/10.1515/zkri-2018-2094

Abstract

A recently reported six-fold twin in β-Ca11B2Si4O22 was interpreted as a transformation twin obtained during cooling of a hypothetical hexagonal high temperature phase. The suggested dichromatic symmetry of the twin is incorrect because (1) a six-fold twin cannot be represented by a dichromatic twin point group but by a hexachromatic group; (2) the reported dichromatic group does not exist. The correct hexachromatic twin point group is reported here.

Keywords: polychromatic symmetry; twin point groups; twinning

References

  • [1]

    S. N. Volkov, V. A. Yukhno, R. S. Bubnova, V. V. Shilovskikh, β-Ca11B2Si4O22: six-fold twinning, crystal structure and thermal expansion. Z. Kristallogr. 2018, 233, 379.Google Scholar

  • [2]

    J. D. Grice, The structure of spurrite, tilleyite and scawtite, and relationships to other silicate-carbonate minerals. Can. Mineral. 2005, 43, 1489.CrossrefGoogle Scholar

  • [3]

    C. M. Midgley, The crystal structure of β dicalcium silicate. Acta Crystallogr. 1952, 5, 307.CrossrefGoogle Scholar

  • [4]

    M. Nespolo, Twin point groups and the polychromatic symmetry of twins. Z. Kristallogr. 2004, 219, 57.Google Scholar

  • [5]

    M. Nespolo, Tips and traps on crystal twinning: how to fully describe your twin. Cryst. Res. Techn. 2015, 50, 362.CrossrefGoogle Scholar

  • [6]

    M. Nespolo, Unravelling the diffraction pattern of a twin. I. Fundamentals. Z. Kristallogr. 2016, 231, 553.Google Scholar

About the article

Received: 2018-05-03

Accepted: 2018-05-25

Published Online: 2018-06-16


Citation Information: Zeitschrift für Kristallographie - Crystalline Materials, 20182094, ISSN (Online) 2196-7105, ISSN (Print) 2194-4946, DOI: https://doi.org/10.1515/zkri-2018-2094.

Export Citation

©2018 Walter de Gruyter GmbH, Berlin/Boston.Get Permission

Comments (0)

Please log in or register to comment.
Log in