Accession Number : AD0674662

Title :   STUDY OF POLYTYPIC PHASE RELATIONS AMONG COMPLEX INORGANIC STRUCTURES.

Descriptive Note : Semi-annual rept. 1 Nov 67-30 Apr 68,

Corporate Author : MICHIGAN UNIV ANN ARBOR DEPT OF GEOLOGY AND MINERALOGY

Personal Author(s) : Peacor,Donald R.

Report Date : JUL 1968

Pagination or Media Count : 12

Abstract : The structure of diaboleite, a derivative of that of perovskite, has been confirmed. Progress on the complete determination of the hematophanite structure, also a derivative of that of perovskite, is reviewed, and some general relations among these structure types is described. Further definition of the structures of plumboferrite and nigerite is reviewed. The initial phases of work on single crystal polytypes at high temperature, in this case wollastonite, showed no tendency for disappearance of superstructure or transformation to the assumed more stable phase. (Author)

Descriptors :   (*MINERALS, PHASE STUDIES), (*FERRITES, *CRYSTAL STRUCTURE), LEAD COMPOUNDS, OXIDES, IRON OXIDES, X RAY DIFFRACTION, TWINNING(CRYSTALLOGRAPHY), PEROVSKITES, CALCIUM COMPOUNDS, SILICATES, COPPER COMPOUNDS, CHLORIDES

Subject Categories : Geology, Geochemistry and Mineralogy
      Miscellaneous Materials
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE