Crystal chemistry and IR spectroscopy of Cl- and SO4-bearing cancrinite-like minerals

P. Ballirano, A. Maras, P R Buseck

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

Cl- and SO4-bearing cancrinite-like minerals from Italian localities were studied by means of EPMA, X-ray diffraction, and IR spectroscopy to relate their chemical composition, IR data, and structural features. The framework of the cancrinite-like minerals consists of six-membercd rings of aluminosilicate tetrahedra stacked along c. Six types of subunits resulting from different stacking sequences can be identified: free channel, cancrinite, sodalite, losod, liottite, and giuseppettite cages. The free channel is possible only with an AB sequence; in fact, the insertion of a C layer interrupts the channel forming the various cages. The occurrence of these structural subunits seems to correspond to the different chemistries of the cancrinite-like minerals, especially their anion content. According to this model, the SO4 group seems to play a major role. With the exception of giuseppettite, it tends to fill completely the available voids within the frameworks.

Original languageEnglish (US)
Pages (from-to)1003-1012
Number of pages10
JournalAmerican Mineralogist
Volume81
Issue number7-8
DOIs
StatePublished - Jan 1 1996

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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