ALMANDINE-PYROPE-GROSSULAR GARNETS - A METHOD FOR ESTIMATING THEIR COMPOSITION USING X-RAY-POWDER DIFFRACTION PATTERNS

Authors
CHMIELOVA M MARTINEC P WEISS Z
Citation
M. Chmielova et al., ALMANDINE-PYROPE-GROSSULAR GARNETS - A METHOD FOR ESTIMATING THEIR COMPOSITION USING X-RAY-POWDER DIFFRACTION PATTERNS, European journal of mineralogy, 9(2), 1997, pp. 403-409
Citations number
19
Categorie Soggetti
Mineralogy
Journal title
European journal of mineralogy → ACNP
ISSN journal
09351221
Volume
9
Issue
2
Year of publication
1997
Pages
403 - 409
Database
ISI
SICI code
0935-1221(1997)9:2<403:AG-AMF>2.0.ZU;2-#
Abstract
Calculated XRD powder patterns for several compositions in the Alm-Py- Gr ternary system were used to provide two identification diagrams for the composition of almandine-pyrope-grossular garnets. The first diag ram is based on the changes of calculated Theta(332) (the diffraction angle of the 332 reflection) and of the intensity ratio of the 332 and 420 reflections (I-332/I-420). The second one is based on the changes of calculated Theta(444) and of the intensity ratio I-642/I-332. Six samples of natural garnets with different compositions determined by e lectron microprobe analysis were selected to check the reliability of the identification diagrams.