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The cation‐atom distribution in a (Cr, Fe, Al, Mg) 3 O 4 spinel as revealed from the channelling effect in electron‐induced X‐ray emission
Author(s) -
Taftø J.
Publication year - 1982
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/s0021889882012205
Subject(s) - octahedron , spinel , channelling , crystallography , atom (system on chip) , chromite , chemistry , tetrahedron , crystal structure , crystal (programming language) , materials science , atomic physics , physics , ion , metallurgy , organic chemistry , computer science , programming language , embedded system
The anomalous production of X‐rays which occurs when an electron beam is incident on a thin crystal under certain crystallographic directions has been used to study the site occupancy in a chromite from the Stillwater Complex, Montana with approximate composition (Cr 0.37 Fe 0.23 Al 0.23 Mg 0.17 ) 3 O 4 . Cr and Al are found to have a strong octahedral and Mg a strong tetrahedral site preference. About 3/4 of the Fe atoms are on tetrahedral sites. Small amounts of Ti and V atoms, about 1/1000 of the total atomic content, are both found to occupy the octahedral sites.