Clinoholmquisite discredited: The new amphibole end-member fluoro-sodic-pedrizite. (Articolo in rivista)

Type
Label
  • Clinoholmquisite discredited: The new amphibole end-member fluoro-sodic-pedrizite. (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.2138/am.2005.1763 (literal)
Alternative label
  • Oberti R.; Camara F.; Ottolini L. (2005)
    Clinoholmquisite discredited: The new amphibole end-member fluoro-sodic-pedrizite.
    in The American mineralogist; Mineralogical Society of America, Washington (Italia)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Oberti R.; Camara F.; Ottolini L. (literal)
Pagina inizio
  • 732 (literal)
Pagina fine
  • 736 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 90 (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
  • CNR, Istituto di Geoscienze e Georisorse, Sezione di Pavia, I-27100 Pavia, Italy CNR, Istituto di Geoscienze e Georisorse, Sezione di Pavia, I-27100 Pavia, Italy CNR, Istituto di Geoscienze e Georisorse, Sezione di Pavia, I-27100 Pavia, Italy (literal)
Titolo
  • Clinoholmquisite discredited: The new amphibole end-member fluoro-sodic-pedrizite. (literal)
Abstract
  • Re-examination of holotype \"clinoholmquistite\", ideally (A)square Li-B(2) (C)(Mg3Al2) Si-T(8) O-22 (X)(OH)(2) (Ginzburg 1965) from the Tastyg spodumene deposit, Tuva, Siberia, Russia by EMP and SIMS analysis and structure refinement shows that the sample consists of a mixture of two distinct amphibole compositions, tremolite and a new amphibole end-member, fluoro-sodic-pedrizite, ideally Na-A Li-B(2) (C)(Mg2Al2Li) Si-T(8) O-22 F-X(2) (IMA-CNMMN 2004-002). Fluoro-sodic-pedrizite from Tastyg has the following crystal-chemical formula and unit-cell parameters: (A)(Na0.64K0.01) (B)(Li1.93Ca0.04Na0.03) (M1)(Mg1.69Fe0.312+) (M2)(Al1.98Cr0.01Zn0.01) (M3)(Li0.64Fe0.212+Mg0.13Mn0.02) (T1)(Si3.96Al0.04) (X)(F1.10OH0.90), a = 9.368(8), b = 17.616(10), and c = 5.271(4) angstrom, beta = 102.38(4)degrees, V = 849.6 angstrom(3), Z = 2. The structure has been refined to R-obs = 2.3% (I > 3 sigma 1) and R-all = 3.8%. Refined site-scattering values and site-geometries were used, together with EMP and SIMS results, to obtain site populations. Fluoro-sodic-pedrizite is the first amphibole end-member with dominant Li-C found in Fe-poor geologic environments. The coexisting tremolite contains only 0.002 wt% Li2O and 0.06 wt% B2O3, probably ordered at the T1 site. Crystal-chemical arguments, as well as preliminary experimental work, suggest clinoholmquistite is unstable. (literal)
Editore
Prodotto di
Autore CNR
Insieme di parole chiave

Incoming links:


Autore CNR di
Prodotto
Editore di
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
Insieme di parole chiave di
data.CNR.it