Accession Number : AD0638918

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

Descriptive Note : Semiannual rept. no. 2, 1 Nov 65-30 Apr 66.

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

Personal Author(s) : Peacor,Donald R.

Report Date : JUL 1966

Pagination or Media Count : 10

Abstract : Senaite was found to be closely related to magnetoplumbite and the hexagonal-ferrites. Three dimensional intensity data were collected, analyzed and used for the computation of the Patterson function P (u,v,w). Analysis of the implication function I3 (u,v,o) together with chemical analyses shows that it has the chemical formula Pb (Ti,Fe,Mn,Mg)24O38. Davidite, which has no cation in the closest-packed framework is shown to be isotypic with senaite and to have the formula (Ti,Fe)21O39. Thus senaite is a compositional and structural link between the Ba-ferrite type phases and other closest-packed oxide phases. Data are also presented on nigerite, plumbo-ferrite and CoGeO3. (Author)

Descriptors :   (*MINERALS, *CRYSTAL STRUCTURE), CRYSTAL LATTICES, PHASE STUDIES, X RAY DIFFRACTION, CHEMICAL ANALYSIS, OXIDES, INORGANIC COMPOUNDS, TWINNING(CRYSTALLOGRAPHY)

Subject Categories : Inorganic Chemistry
      Geology, Geochemistry and Mineralogy
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE