Phase transitions and microstructures in natural kaliophilite

D. Cellai, M. A. Carpenter, Peter J. Heaney

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

An investigation using TEM, high temperature X-ray powder diffraction and high temperature single-crystal X-ray diffraction revealed previously unreported microstructures and phase transitions in natural kaliophilite. Measurements of unit cell dimensions from room temperature to 895°C indicate the existence of a displacive phase transition at ~725°C between two hexagonal phases with the same unit cell. A symmetry change of P6322 ⇄ P63 is tentatively suggested with the concomitant development of merohedral twins. The thermal evolution of kaliophilite is sufficiently different from that of kalsilite to indicate that it has a different framework topology and is not a true stuffed tridymite structure. -from Authors

Original languageEnglish (US)
Pages (from-to)1209-1220
Number of pages12
JournalEuropean Journal of Mineralogy
Volume4
Issue number6
DOIs
StatePublished - Jan 1 1992

Fingerprint

phase transition
microstructure
Phase transitions
kalsilite
X-ray diffraction
tridymite
Microstructure
thermal evolution
topology
symmetry
transmission electron microscopy
crystal
Silicon Dioxide
X ray powder diffraction
Temperature
Topology
Single crystals
Transmission electron microscopy
X ray diffraction
temperature

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology

Cite this

Cellai, D. ; Carpenter, M. A. ; Heaney, Peter J. / Phase transitions and microstructures in natural kaliophilite. In: European Journal of Mineralogy. 1992 ; Vol. 4, No. 6. pp. 1209-1220.
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Phase transitions and microstructures in natural kaliophilite. / Cellai, D.; Carpenter, M. A.; Heaney, Peter J.

In: European Journal of Mineralogy, Vol. 4, No. 6, 01.01.1992, p. 1209-1220.

Research output: Contribution to journalArticle

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