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American Mineralogist

Journal of Earth and Planetary Materials

Ed. by Baker, Don / Xu, Hongwu / Swainson, Ian


IMPACT FACTOR 2017: 2.645

CiteScore 2018: 2.55

SCImago Journal Rank (SJR) 2018: 1.355
Source Normalized Impact per Paper (SNIP) 2018: 1.103

Online
ISSN
1945-3027
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Volume 88, Issue 10

Issues

Incommensurate phase in the kosmochlor-diopside join: A new polymorph of clinopyroxene

Shizue Sakamoto / Norimasa Shimobayashi / Masao Kitamura
Published Online: 2015-03-31 | DOI: https://doi.org/10.2138/am-2003-1024

Abstract

Electron-diffraction patterns of clinopyroxene with an intermediate composition between kosmochlor and diopside show the presence of satellite reflections in diffuse streaks running perpendicular to (111) planes of the C2/c structure. The position of these satellite reflections indicates the existence of an incommensurate (INC) phase. Based on the characteristics of the diffraction patterns, it is suggested that the INC phase consists of a regular arrangement of kosmochlor-rich and diopside-rich slabs with a periodicity 2.6 to 6.0 times the (111) spacing in the C2/c structure. This is a new ordering scheme in clinopyroxenes.

About the article

Received: 2003-03-06

Accepted: 2003-05-22

Published Online: 2015-03-31

Published in Print: 2003-10-01


Citation Information: American Mineralogist, Volume 88, Issue 10, Pages 1605–1607, ISSN (Online) 1945-3027, ISSN (Print) 0003-004X, DOI: https://doi.org/10.2138/am-2003-1024.

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© 2015 by Walter de Gruyter Berlin/Boston.

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