Melt growth of spessartine (Mn3Al2Si3O12)

Joost L.M. Van Haren, Cornelis F. Woensdregt

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

The habit of spessartine (Mn3Al2Si3O12) garnet crystals grown in nature is determined by the presence of a large icositetrahedral crystal form {112} and a minor rhombic dodecahedron form {110}. This is in contrast with all other natural garnet crystals for which {110} is always more important than {112}. Theoretical growth forms derived from attachment energy calculations indicate that {110} should be the dominant form for all natural garnets. Spessartine crystals were grown experimentally at atmospheric pressure and at temperatures of 1175-1195°C from a molten stoichiometric mixture of tephroite (Mn2SiO4), γ -alumina (Al2O3) and quartz (SiO2). Their habit is identical to that of natural grown spessartine crystals. The specific {112} spessartine habit may be caused by the presence of Mn3+ during the growth as an impurity.

Original languageEnglish (US)
Pages (from-to)107-110
Number of pages4
JournalJournal of Crystal Growth
Volume226
Issue number1
DOIs
StatePublished - Jun 1 2001
Externally publishedYes

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Keywords

  • A1. Crystal morphology
  • A2. Growth from melt
  • B1. Garnets
  • B1. Minerals
  • B1. Silicates
  • B1. Spessartine

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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