Evidence for an 12/a to Imab phase transition in the silica polymorph moganite at ∼570 K

American Mineralogist

Volumn 86, Issue 11-12, 2001, Pages 1358-1366

  Heaney, P J ^a   Post, J E ^a  

^a PENNSYLVANIA STATE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

GEOMETRY; RIETVELD ANALYSIS; STRAIN; TEMPERATURE DISTRIBUTION; THERMAL EXPANSION; X RAY POWDER DIFFRACTION;

DISPLACIVE TRANSITIONS; LINEAR TEMPERATURE DEPENDENCE; NEUTRON DIFFRACTION DATA; REVERSIBLE PHASE TRANSITION; SILICA POLYMORPHS; STRUCTURAL CONSTRAINTS; SYNCHROTRON X RAY POWDER DIFFRACTION; THERMAL EXPANSION BEHAVIOR;

SILICA;

MOGANITE; PHASE TRANSITION; SILICA; THERMAL EXPANSION; X-RAY DIFFRACTION;

EID: 0035672835     PISSN: 0003004X     EISSN: None     Source Type: Journal    
DOI: 10.2138/am-2001-11-1204     Document Type: Article

References (36)

1. A new single-crystal heater for the precession camera and four-circle diffractometer
2. Elastic anomalies in minerals due to structural phase transitions
3. Spontaneous strain as a determinant of thermodynamic properties for phase transitions in minerals
4. Calibration of excess thermodynamic properties and elastic constant variations associated with the α ↔ β phase transition in quartz
5. A moganite-type phase in the silica analog phosphorus oxynitride
6. High-temperature phase transitions in Steinbach tridymite
7. Rigid unit modes in framework structures: Theory, experiment and applications
8. A correction for powder diffraction peak asymmetry due to axial divergence
9. A new microcrystalline silica from Gran Canaria
10. Moganite: A new microcrystalline silica-mineral
11. Chemical geothermometers and mixing models for geothermal systems
12. Estimation of underground temperatures from the silica content of water from hot springs and wet-steam wells
13. Kinetic and thermodynamic properties of moganite, a novel silica polymorph
14. Structural characteristics of opaline and microcrystalline silica minerals
15. The nature of water in chalcedony and opal-C from Brazilian agate geodes
16. Crystal structure of moganite-type phosphorus oxynitride: Relationship to other twinned-quartz-based structures
17. Two-dimensional detector software: From real detector to idealised image or two-theta scan
18. Structure and chemistry of the low-pressure silica polymorphs
19. Moganite as an indicator for vanished evaporites: A testament reborn?
20. The widespread distribution of a novel silica polymorph in microcrystalline quartz varieties
21. Crystal structure of moganite: A new structure type for silica
22. 2-Minerals Moganit
23. Quartz family of silica polymorphs: Comparative simulation study of quartz, moganite, and orthorhombic silica, and their phase transformations
24. Synchrotron powder diffraction using imaging plates: Crystal structure determination and Rietveld refinement
25. Thermochemistry of the new silica polymorph moganite
26. Rietveld refinement of crystal structures using powder X-ray diffraction data
27. The α-β transformation of quartz
28. Landau free energy and order parameter behaviour of the α/β phase transition in cristobalite
29. The crystal and molecular structure of beryllium hydride
30. Phenomenological model of anisotropic peak broadening in powder diffraction
31. 3
32. The α-β transition in amethyst quartz as studied by electron microscopy and diffraction
33. Rietveld refinement with spallation neutron powder diffraction data
34. Crystal structures of quartz, and magnesium germanate by profile analysis of synchrotron-radiation high-resolution powder data