ON THE CLASSIFICATION OF AMPHIBOLES (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• ON THE CLASSIFICATION OF AMPHIBOLES (Articolo in rivista) (literal)

Anno

• 2006-01-01T00:00:00+01:00 (literal)

Alternative label

• Hawthorne F.C.; Oberti R. (2006)
  ON THE CLASSIFICATION OF AMPHIBOLES
  in Canadian mineralogist
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Hawthorne F.C.; Oberti R. (literal)

Pagina inizio

• 1 (literal)

Pagina fine

• 21 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 44 (literal)

Rivista

• Canadian mineralogist (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• FRANK C. HAWTHORNE§ AND ROBERTA OBERTI CNR - Istituto di Geoscienze e Georisorse, unità di Pavia, Via Ferrata 1, I- 27100 Pavia, Italy; § Department of Geological Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada (literal)

Titolo

• ON THE CLASSIFICATION OF AMPHIBOLES (literal)

Abstract

• Major issues involved in the classifi cation of the amphiboles are examined: (1) the role of (OH), Li and Fe3+, (2) the formal defi nition of a root name, (3) irreducible charge-arrangements and distinct species, (4) the use of prefi xes, (5) the principal chemical variables used in a classifi cation procedure, and (6) the use of the dominant-constituent principle. The current IMAapproved classifi cation scheme is based on the A, B and T groups of cations in the amphibole formula: AB2C5T8O22W2. We argue here that classifi cation should be based on the A, B and C groups of cations as (i) it is in these groups of cations that the maximum variation in chemical composition occurs, and (ii) as a result of (i), the scheme is more in accord with the IMA-sanctioned dominant-constituent principle, which governs the recognition (and approval) of distinct mineral species. Two new classifi cations are presented here; one is based on the A, B and C groups of cations, and another on the dominant-constituent principle. These two schemes were produced to illustrate (i) the problems inherent in the classifi cation of a group of minerals as complicated as the amphiboles, and (ii) the sometimes disparate needs of crystallographer, mineralogist, petrologist and geochemist. Scheme 1 conserves current formulae and names as much as possible, whereas scheme 2 minimizes the number of formulae and names as much as possible. The differences between the current classifi cation and the two schemes presented here are discussed, and we highlight the problems associated with each scheme. (literal)

Prodotto di

• Metodologie integrate per la conoscenza di processi e materiali geologici e del loro impatto sull'uomo e l'ambiente (TA.P04.014.002) (Modulo)
• Istituto di geoscienze e georisorse (IGG) (Istituto)

Autore CNR

• ROBERTA MARIA OBERTI (Persona)

Insieme di parole chiave

• Keywords of "ON THE CLASSIFICATION OF AMPHIBOLES" (Insieme di parole chiave)

Incoming links:

Autore CNR di

• ROBERTA MARIA OBERTI (Persona)

Prodotto

• Istituto di geoscienze e georisorse (IGG) (Istituto)
• Metodologie integrate per la conoscenza di processi e materiali geologici e del loro impatto sull'uomo e l'ambiente (TA.P04.014.002) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Canadian mineralogist (Rivista)

Insieme di parole chiave di

• Keywords of "ON THE CLASSIFICATION OF AMPHIBOLES" (Insieme di parole chiave)