Ceramics-Silikáty 41, (3) 98 - 104 (1997) |
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CRONSTEDTITE-1M AND CO-EXISTENCE OF 1M AND 3M POLYTYPES
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Ďurovič Slavomil
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Institute of Inorganic Chemistry,
Slovak Academy of Sciences, 812 36 Bratislava, Slovak Republic
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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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