ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 41, (3) 98 - 104 (1997)


CRONSTEDTITE-1M AND CO-EXISTENCE OF 1M AND 3M POLYTYPES
 
Ďurovič Slavomil
 
Institute of Inorganic Chemistry, Slovak Academy of Sciences, 812 36 Bratislava, Slovak Republic

An individual single crystal of cronstedtite-1M has been identi­fied in a specimen from Eisleben (Saxony). Its quality, however, does not allow for a structure refinement. If cronstedtite-1M co­exists with cronstedtite 3T in the same crystal, it "monoclinizes" its single-crystal diffraction pattern. These two polytypes can­not be distinguished by powder diffraction.


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