Original paper
Katayamalite and baratovite are structurally identical
Baur, Werner H.; Kassner, Dethard
European Journal of Mineralogy Volume 4 Number 4 (1992), p. 839 - 842
7 references
published: Aug 5, 1992
manuscript accepted: Apr 6, 1992
manuscript received: Nov 25, 1991
DOI: 10.1127/ejm/4/4/0839
Abstract
Abstract An investigation of the crystal structure of the mineral katayamalite, KLi3Ca7Ti2[Si6O18]2(OH,F)2 , shows that it is best described as monoclinic in space group C2/c, and not as centrosymmetrically triclinic as originally proposed. Moreover, a comparison of the crystal structures of katayamalite and baratovite, KLi3Ca7(Ti,Zr)2[Si6O18]2(OH,F)2, shows them to be identical within experimental error. The only difference between the two minerals is the slightly different chemical composition. Therefore katayamalite and baratovite are structurally identical minerals.
Keywords
Katayamalite • baratovite • symmetry • crystal structure • ring silicate