Detailansicht
Feldspar Minerals
Volume 1 Crystal Structures, Physical, Chemical, and Microtextural Properties
ISBN/EAN: 9783642725968
Umbreit-Nr.: 5650905
Sprache:
Englisch
Umfang: xviii, 828 S.
Format in cm:
Einband:
kartoniertes Buch
Erschienen am 01.02.2012
Auflage: 2/2013
- Zusatztext
- Remarks by JVS. Volumes 1 and 2 of Feldspar Minerals were published in 1974, but Volume 3 was not completed because I was forced to devote 3 years to the resolution of unforeseen problems in the construction of an ion probe. By 1977, the incomplete draft for Volume 3 had become obsolete because of the enormous advances in knowledge of feldspars, particularly those in lunar rocks and meteorites, and in both deep-seated and ancient terrestrial rocks. Furthermore, it soon became obvious that a completely new version of Feldspar Minerals was needed because of the important new results on the physical and chemical properties. I had kept up with the interesting but tedious chore of weekly reading of the incoming literature and maintenance of the files. By 1980, the intense day-to day pressure had gone from my research programs on lunar rocks and on the development of the ion microprobe as a quantitative geochemical instrument, and I began preparation of a second edition of Feldspar Minerals.
- Kurztext
- Inhaltsangabe1 Crystal Structures.- 1 Introduction.- 1.1 Crystallographic Background.- 1.2 Crystal Structure of Feldspar.- 1.3 Background on Phase Equilibria.- 1.4 Phase Equilibria of Feldspars.- 1.4.1 Alkali Feldspars.- 1.4.2 Plagioclase Feldspars.- 1.4.3 Phase Relations for Natural Feldspars.- 1.4.4 Nomenclature.- 2 Crystal Structure of Feldspar. Principal Features. Related Structures.- 2.1 The Topology of the Aluminosilicate Framework.- 2.2 General Features of Feldspar Structures.- 2.3 Pseudo-Close-Packing of Atoms: Pseudosymmetry.- 2.4 Structures of Related Minerals.- 2.4.1 Minerals Based on 4.8.8 Net.- 2.4.2 Hollandite Structure Type.- 2.4.3 The Hexagonal Structures.- 2.4.4 Pseudo-Orthorhombic CaAl2Si2O8.- 3 Order - Disorder.- 3.1 Mathematical and Crystallographic Bases of Ordering.- 3.2 Experimental Techniques for Determination of Si,Al Order in Feldspars.- 3.3 Mathematical Descriptions of Si,Al Order in Feldspars.- 3.3.1 Algebraic Description of Site Populations and Atomic Order.- 3.3.2 Topochemistry of Ordered Phases.- 3.4 Si,Al Ordering in AlSi3 and Related Feldspars.- 3.5 Si,Al Ordering in Al-Rich Feldspars.- 3.6 Crystal-Chemical Explanation of Ordering.- 3.6.1 Alternation in Al2Si2 Feldspar.- 3.6.2 Choice of T1 Site in AlSi3 Feldspar.- 3.6.3 Limitation of Al:Si Ratio Between 1:3 and 2:2.- 4 Detailed Geometry and Atomic Coordination.- 4.1 General Features.- 4.2 Geometry of the Framework.- 4.2.1 T-O Distances and O-T-O Angles.- 4.2.2 T-O-T Angles.- 4.3 Environment of M Atoms.- 4.4 Atomic Displacements from Thermal Motion and Substitutional Disorder.- 4.5 Temperature Variation of Atomic Positions and Displacements.- 5 Complex Crystal Structures.- 5.1 Summary of Theoretical Concepts.- 5.2 Crystal Structures and Domain Textures in Anorthite (100 to ~90% An).- 5.3 e-Plagioclase.- 5.4 Structural Aspects of Heating. Experiments on Plagioclase.- 2 Physical Properties and Experimental Techniques.- 6 X-Ray and Neutron Diffraction Techniques.- 6.1 Single-Crystal Diffraction Techniques.- 6.1.1 General.- 6.1.2 Alkali Feldspars.- 6.1.3 Plagioclase.- 6.2 Powder Techniques.- 6.2.1 General.- 6.2.2 Alkali Feldspars and Celsian.- 6.2.3 Plagioclase and Reedmergnerite.- 7 Cell Parameters and Macroscopic Thermal Expansion and Compression.- 7.1 General.- 7.2 End-Member Feldspars and General Interpretation.- 7.3 Alkali Feldspars.- 7.3.1 General and Historical.- 7.3.2 Homogeneous Alkali Feldspars.- 7.3.3 Perthites and Coherency Stress and Strain.- 7.3.4 Determinative Methods.- 7.3.5 Thermal Expansion, Compression and Phase Transformations.- 7.4 Plagioclase Feldspars.- 7.4.1 General.- 7.4.2 Cell Parameters of Natural and Synthetic Plagioclases.- 7.4.3 Interpretation in Terms of Crystal Structure.- 7.4.4 Simple Determinative Methods.- 7.4.5 Dimensional Changes Caused by Heating.- 7.5 Ternary Feldspars and K-Exchanged Plagioclase.- 7.5.1 General.- 7.5.2 K-Exchanged Plagioclase.- 7.5.3 Ternary Feldspars.- 7.6 Ba,K,Na Feldspars.- 7.7 Synthetic Analogs.- 7.7.1 Substitutions in M-Sites.- 7.7.2 Substitutions in T-Sites.- 8 Light Optics.- 8.1 Techniques and Precision.- 8.2 Alkali Feldspars.- 8.2.1 Introduction.- 8.2.2 Albite.- 8.2.3 Potassium Feldspar.- 8.2.4 Alkali Feldspars.- 8.2.5 The Effect of Dry Heating on the Optics of Alkali Feldspars.- 8.3 Plagioclase.- 8.3.1 Introduction.- 8.3.2 Optic Axial Angle.- 8.3.3 Refractive Indices.- 8.3.4 Optical Orientation and Extinction Angles.- 8.4 K,Ba and Other Feldspars.- 8.5 Determinative Methods.- 8.5.1 Alkali Feldspars.- 8.5.2 Plagioclase.- 9 Nomenclature, General Properties of Feldspars and Simple Determinative Diagrams.- 9.1 General.- 9.2 A Simple Chemical and Optical Classification of Feldspars.- 9.2.1 Nomenclature for Homogeneous High-Temperature Disordered Feldspars.- 9.2.2 Nomenclature for Partly to Fully Ordered Feldspars.- 9.2.3 Compositional Restrictions in Different Geological Environments.- 9.2.4 Procedure for Naming a Feldspar.- 9.3 Alkali Feldspars.- 9.3.1 Orthoclase and Or-Rich Feldspars.- 9.3.2 A Simple