The crystal structure of amesite from Mount Sobotka: A nonstandard polytype

Abstract

6 pages, figures, and tables statistics.The crystal structure of a violet phyllosilicate from the serpentinite massif of the Sobotka Mountains, lower Silesis, Poland, identified as amesite by powder diffractometry, wet chemical anslysis, and IR absorption spctrometry, has been determined by single-crystal X-ray diffraction methods. The mineral has a composition elose to that of the ideal end-member amesite but with significant amounts of Cr, Fe2+, and Ni. The formula is (Mg...)Peer reviewe