Open AccessINTERGROWTH AND DISORDER STACKING IN THE CRYSTAL STRUCTURE OF ALKALINE-EARTH-CERIUM FLUOROCARBONATE MINERALS
Author(s) -
Fan Hai-Fu,
Fanghua Li
Publication year - 1982
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.31.680
Subject(s) - cerium , barium , stacking , crystal structure , materials science , alkaline earth metal , mineral , calcium , mineralogy , crystal (programming language) , crystallography , chemistry , metallurgy , programming language , organic chemistry , computer science , metal
The cerium fluorocarbonate minerals containing both calcium and barium have been studied by the lattice imaging technique. It has been found that the crystal structure of such minerals are formed by stacking at random along the direction c layers of various barium-Cerium as well as calcium-cerium fluorocarbonate minerals. The inter-growth of some calcium-cerium fluorocarbonate minerals with different composition has been observed in the range of several angstrons. A possible new polytype in Roentgenite has been proposed. The results show the advantage of the lattice imaging technique in direct observation of the crystal structure of such minerals.