Crystal morphology of monoclinic potassium feldspars; a qualitative approach with special emphasis on the periodic bond chain theory of Hartmann and Perdok

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Authors:Woensdregt, C. F.
Author Affiliations:Primary:
Inst. Aardwetenschappen, Utrecht, Netherlands
Volume Title:Zeitschrift für Kristallographie
Source:Zeitschrift für Kristallographie, 163(1-2), p.15-33. Publisher: Akademische Verlagsgesellschaft, Wiesbaden, Federal Republic of Germany. ISSN: 0044-2968
Publication Date:1983
Note:In English. 25 refs.; illus. incl. 4 tables, chart
Summary:The most important crystal faces can be classified as either F1 faces parallel to at least two PBCs having only T-O bonds, or as F2 faces parallel to at least two PBCs, one of which also contains K-O bonds. The F1 faces are (110), (001), (010), (201) and (111). The F2 faces are (130), (021), (221), (112), (100) and (101). The remaining faces parallel to the various PBCs are S faces. Crystals grown in nature display only F faces as the most important faces. The presence of S faces is induced by internal factors other than crystal structure or by external factors such as impurities and supersaturation. [A.P.]
Subjects:Alkali feldspar; Crystal growth; Crystal structure; Crystal systems; Feldspar group; Framework silicates; Habit; Minerals; Models; Monoclinic system; Silicates; Hartmann-Perdok model
Abstract Numbers:84M/2525
Record ID:1986013169
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique
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