Premium
Twinning in Natural Diamond. II. Interpenetrant Cubes
Author(s) -
Machado W. G.,
Moore Moreton,
Yacoot A.
Publication year - 1998
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889898005329
Subject(s) - diamond , crystal twinning , cuboid , branching (polymer chemistry) , multiplicity (mathematics) , materials science , crystallography , composite material , mineralogy , geometry , chemistry , microstructure , mathematics
Single crystals of natural diamond which exhibit an approximately cubic morphology are known to have grown either ( a ) by nonfaceted cuboid growth or ( b ) by fibrous growth branching in a multiplicity of 〈111〉 columns, to give a mean surface orientation of {100}. Interpenetrant twins of diamond are uncommon; but when they occur they are usually coloured and appear (by X‐ray topography) to have been formed by fibrous growth upon a twin origin, with the 14 growth sectors adequately filled by fibres, without the necessity of branching.