CRYSTAL-STRUCTURE REFINEMENT OF BOROMUSCOVITE POLYTYPES USING A COUPLED RIETVELD STATIC-STRUCTURE ENERGY-MINIMIZATION METHOD (Articolo in rivista)

Type
Label
  • CRYSTAL-STRUCTURE REFINEMENT OF BOROMUSCOVITE POLYTYPES USING A COUPLED RIETVELD STATIC-STRUCTURE ENERGY-MINIMIZATION METHOD (Articolo in rivista) (literal)
Anno
  • 1995-01-01T00:00:00+01:00 (literal)
Alternative label
  • LIANG J.J. 1; HAWTHORNE F.C. 1; NOVAK M. 1; CERNY P. 1; OTTOLINI L. 2 (1995)
    CRYSTAL-STRUCTURE REFINEMENT OF BOROMUSCOVITE POLYTYPES USING A COUPLED RIETVELD STATIC-STRUCTURE ENERGY-MINIMIZATION METHOD
    in Canadian mineralogist
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • LIANG J.J. 1; HAWTHORNE F.C. 1; NOVAK M. 1; CERNY P. 1; OTTOLINI L. 2 (literal)
Pagina inizio
  • 859 (literal)
Pagina fine
  • 865 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 33 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. UNIV MANITOBA,DEPT GEOL SCI,WINNIPEG,MB R3T 2N2,CANADA; 2. CNR,CTR STUDIO CRISTALLOCHIM & CRISTALLOGRAFIA,I-27100 PAVIA,ITALY; (literal)
Titolo
  • CRYSTAL-STRUCTURE REFINEMENT OF BOROMUSCOVITE POLYTYPES USING A COUPLED RIETVELD STATIC-STRUCTURE ENERGY-MINIMIZATION METHOD (literal)
Abstract
  • Boromuscovite from a granitic pegmatite at Recice, Czech Republic, occurs only as very fine-grained aggregates, and is a mixture of 2M(1) and 1M polytypes. Crystal structures of both polytypes have been simultaneously refined in space groups C2/c and C2/m, respectively, using a coupled Rietveld - static-structure energy-minimization method. Intensity data were collected on a high-resolution powder diffractometer in transmission geometry, with the sample prepared such that preferred orientation is largely avoided. The refinement converged to R(wp) = 13.8% (R(exp) = = 7.9%), R(BRG) (2M(1)) = 3.8%, and R(BRG) (1M) = 3.8%. Boron is evenly distributed between the two polytypes, and distances correspond well with the B-content at the corresponding T-sites. (literal)
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