Article
Licensed
Unlicensed
Requires Authentication
Model pyroxenes II: Structural variation as a function of tetrahedral rotation
-
Richard M. Thompson
and
Robert T. Downs
Published/Copyright:
March 28, 2015
Abstract
Model pyroxenes with regular tetrahedral and M1 octahedral coordination polyhedra have been derived. The M2 polyhedron is not constrained to be regular. These models are parameterized in terms of the O3-O3-O3 angle, θ, and the model O atom radius, r. Crystallographic parameters such as interatomic distances, unit cell volume, and packing distortion are determined as a function of the O3-O3-O3 angle. Results are compared with observed pyroxenes, providing insight into which interatomic interactions are important in determining pyroxene topology and behavior. Temperature is shown to favor polyhedral regularity in orthopyroxene and protopyroxene. Compression and expansion strain ellipsoids for observed and model pyroxenes are compared, demonstrating that a combination of tetrahedral rotation and isotropic compression approximately reproduces the compression ellipsoids of pyroxenes, but not the expansion ellipsoids.
Received: 2003-5-6
Accepted: 2003-9-17
Published Online: 2015-3-28
Published in Print: 2004-4-1
© 2015 by Walter de Gruyter Berlin/Boston
You are currently not able to access this content.
You are currently not able to access this content.
Articles in the same Issue
- A zero-damage model for fission-track annealing in zircon
- Unoccupied states of pyrite probed by electron energy-loss spectroscopy (EELS)
- Tugtupite: High-temperature structures obtained from in situ synchrotron diffraction and Rietveld refinements
- SIMS microanalyses for Au in silicates
- Geochemistry of oxide minerals of Nb, Ta, Sn, and Sb in the Varuträsk granitic pegmatite, Sweden: The case of an “anomalous” columbite-tantalite trend
- An X-ray and electron microprobe study of Fe, Ni, Ga, and Ge distribution and local structure in a section of the Canyon Diablo iron meteorite
- Mineralogical approaches to fundamental crystal dissolution kinetics
- Cu L3X-ray absorption spectroscopy and the electronic structure of minerals: Spectral variations in non-stoichiometric bornites, Cu5FeS4
- A new nondestructive X-ray method for the determination of the 3D mineralogy at the micrometer scale
- Dissolution rates and pit morphologies of rhombohedral carbonate minerals
- The effect of TiO2on Pd, Ni, and Fe solubilities in silicate melts
- X-ray absorption spectroscopic study of Fe reference compounds for the analysis of natural sediments
- A survey of hydrous species and concentrations in igneous feldspars
- Structure and crystallization behavior of the (Ba,Sr)HAsO4·H2O solid-solution in aqueous environments
- The crystal structure of painite CaZrB[Al9O18] revisited
- Model pyroxenes II: Structural variation as a function of tetrahedral rotation
- Mn-rich fluorapatite from Austria: Crystal structure, chemical analysis, and spectroscopic investigations
- Isothermal equation of state and compressional behavior of tetragonal edingtonite
- Synthesis and crystal-chemistry of Na(NaMg)Mg5Si8O22(OH)2, a P21/m amphibole
- A single-crystal study on the pressure behavior of phlogopite and petrological implications
- Quantitative electron microprobe analysis of Fe3+/ΣFe: Basic concepts and experimental protocol for glasses
Articles in the same Issue
- A zero-damage model for fission-track annealing in zircon
- Unoccupied states of pyrite probed by electron energy-loss spectroscopy (EELS)
- Tugtupite: High-temperature structures obtained from in situ synchrotron diffraction and Rietveld refinements
- SIMS microanalyses for Au in silicates
- Geochemistry of oxide minerals of Nb, Ta, Sn, and Sb in the Varuträsk granitic pegmatite, Sweden: The case of an “anomalous” columbite-tantalite trend
- An X-ray and electron microprobe study of Fe, Ni, Ga, and Ge distribution and local structure in a section of the Canyon Diablo iron meteorite
- Mineralogical approaches to fundamental crystal dissolution kinetics
- Cu L3X-ray absorption spectroscopy and the electronic structure of minerals: Spectral variations in non-stoichiometric bornites, Cu5FeS4
- A new nondestructive X-ray method for the determination of the 3D mineralogy at the micrometer scale
- Dissolution rates and pit morphologies of rhombohedral carbonate minerals
- The effect of TiO2on Pd, Ni, and Fe solubilities in silicate melts
- X-ray absorption spectroscopic study of Fe reference compounds for the analysis of natural sediments
- A survey of hydrous species and concentrations in igneous feldspars
- Structure and crystallization behavior of the (Ba,Sr)HAsO4·H2O solid-solution in aqueous environments
- The crystal structure of painite CaZrB[Al9O18] revisited
- Model pyroxenes II: Structural variation as a function of tetrahedral rotation
- Mn-rich fluorapatite from Austria: Crystal structure, chemical analysis, and spectroscopic investigations
- Isothermal equation of state and compressional behavior of tetragonal edingtonite
- Synthesis and crystal-chemistry of Na(NaMg)Mg5Si8O22(OH)2, a P21/m amphibole
- A single-crystal study on the pressure behavior of phlogopite and petrological implications
- Quantitative electron microprobe analysis of Fe3+/ΣFe: Basic concepts and experimental protocol for glasses
