Texture characteristics of naturally occurring lonsdaleite-containing diamonds

Details Texture characteristics of naturally occurring lonsdaleite-containing diamonds Texture characteristics of naturally occurring lonsdaleite-containing diamonds

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990geokh.....1179k&link_type=abstract

Geokhimiia (ISSN 0016-7525), Aug. 1990, p. 1179-1184. In Russian.

Computer Science

Crystal Structure, Diamonds, Meteoritic Composition, Textures, Asia, U.S.S.R.

Scientific paper

The crystalline structure of six naturally occurring lonsdaleite-containing diamonds from Iakutia placers was determined using the Borodkina and Spektor (1981) XRD method. The slope angle for recordings of (111) reflections was varied from 0 to 90 deg, while for recording of (110) and (311) reflections, the slope angle was varied from 0 to 70 deg; the results were used to construct polar figures for these plane orientations. The crystalline characteristics observed in the six diamond samples support the hypothesis that the process of lonsdaleite formation in these samples is similar to the synthesis process in synthetic diamonds. The arrangement of the lonsdaleite lattice is constrained by the -110 line oriented direction in the diamond structure.

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