Ernest H. Nickel

THE IMA COMMISSION ON NEW MINERALS AND MINERAL NAMES : PROCEDURES AND GUIDELINES ON MINERAL NOMENCLATURE, 1998

SummaryAn author wishing to introduce a new mineral name into the literature, or to redefine, discredit or rename an existing mineral, must obtain prior approval of the IMA Commission on New Minerals and Mineral Names. This paper outlines the procedure to be followed in the preparation and submission of a proposal for approval, and describes how such proposals are handled by the Commission. The paper also gives general guidelines on mineral nomenclature and provides a list of nomenclature changes approved since 1987.ZusammenfassungAutoren, die einen neuen Mineralnamen in die Literatur einführen, oder einen solchen neu definieren, abschaffen oder ein schon bekanntes Mineral mit einem neuen Namen belegen wollen, müssen dafür vorher die Zustimmung der IMA Commission of New Minerals and Mineral Names einholen. In dieser Arbeit wird die empfohlene Vorgangsweise für die Vorbereitung und Einreichung eines Antrages dargestellt. Ebenso wird die Vorgangsweise der Kommission, die sich mit solchen Anträgen befaßt, in Übersicht gebracht. Weiters geben wir allgemeine Hinweise zur Nomenklatur von Mineralen und geben eine Liste von Nomenklatur-Änderungen vor, die seit 1987 genehmigt worden ist.

Recommended nomenclature for zeolite minerals: report of the subcommittee on zeolites of the International Mineralogical Association, Commission on New Minerals and Mineral Names

Abstract This report embodies recommendations on zeolite nomenclature approved by the International Mineralogical Association Commission on New Minerals and Mineral Names. In a working definition of a zeolite mineral used for this review, interrupted tetrahedral framework structures are accepted where other zeolitic properties prevail, and complete substitution by elements other than Si and Al is allowed. Separate species are recognized in topologically distinctive compositional series in which different extra-framework cations are the most abundant in atomic proportions. To name these, the appropriate chemical symbol is attached by a hyphen to the series name as a suffix except for the names harmotome, pollucite and wairakite in the phillipsite and analcime series. Differences in space- group symmetry and in order-disorder relationships in zeolites having the same topologically distinctive framework do not in general provide adequate grounds for recognition of separate species. Zeolite species are not to be distinguished solely on Si : Al ratio except for heulandite (Si : Al < 4.0) and clinoptilolite (Si : Al ≥ 4.0). Dehydration, partial hydration, and over-hydration are not sufficient grounds for the recognition of separate species of zeolites. Use of the term ‘ideal formula’ should be avoided in referring to a simplified or averaged formula of a zeolite. Newly recognized species in compositional series are as follows: brewsterite-Sr, -Ba; chabazite-Ca, - Na, -K; clinoptilolite-K, -Na, -Ca; dachiardite-Ca, -Na; erionite-Na, -K, -Ca; faujasite-Na, -Ca, -Mg; ferrierite-Mg, -K5 -Na; gmelinite-Na, -Ca, -K; heulandite-Ca, -Na, -K5 -Sr; levyne-Ca, -Na; paulingite- K, -Ca; phillipsite-Na, -Ca, -K; stilbite-Ca, -Na. Key references, type locality, origin of name, chemical data, IZA structure-type symbols, space-group symmetry, unit-cell dimensions, and comments on structure are listed for 13 compositional series, 82 accepted zeolite mineral species, and three of doubtful status. Herschelite, leonhardite, svetlozarite, and wellsite are discredited as mineral species names. Obsolete and discredited names are listed.

The standardisation of mineral group hierarchies: application to recent nomenclature proposals

A simplified definition of a mineral group is given on the basis of structural and compositional aspects. Then a hier- archical scheme for group nomenclature and mineral classification is introduced and applied to recent nomenclature proposals. A new procedure has been put in place in order to facilitate the future proposal and naming of new mineral groups within the IMA-CNMNC framework.

Alunite supergroup: recommended nomenclature

Abstract Minamiite has been discredited and renamed natroalunite-2c to show a double unit-cell structure and natroalunite can be designated as natroalunite-1c to show a single unit-cell structure. Kintoreite can be designated as kintoreite-1c to show the same single unit-cell structure, and IMA 1993-039 is a new superstructure of kintoreite and can be designated as kintoreite-2c to show a double unit-cell structure. Beaverite has been renamed beaverite-(Cu). The Zn-bearing beaverite of Sato et al. (2008) has been named “beaverite-(Zn)″, but data for the mineral have not been approved by the CNMNC. Orpheite has been discredited as P-rich hinsdalite. Proposal 07-D was approved by the CNMNC.

The occurrence of native nickel-iron in the serpentine rock of the Eastern Townships of Quebec Province

Native Ni-Fe has been found over a wide area in the serpentinized asbestos-bearing rock of the eastern townships of Quebec. The chemical composition (average of 2 analyses) is: Ni 71.0%, Fe 25.3%, Co 3.5%, and Cu 0.2%. The Ni-Fe forms a single-phase alloy with a face-centered cubic structure and a cell constant which varies from 3.551 to 3.555 Aa. It occurs chiefly as tiny spheroidal grains, most of which are less than 10 microns in diameter, but also as large crenulated grains up to 100 microns in diameter, and as acicular crystals up to 100 microns in length. The Ni-Fe appears to have been formed as the result of the breakdown, during serpentinization of primary olivine and enstatite containing about 0.2% combined Ni.

The composition and crystallography of niocalite

Niocalite is monoclinic with a=10.83, b=10.42, c=7.38 Aa, and beta =109 degrees 409. On the basis of 2 chemical analyses, the generalized formula is (Ca,Nb) 16 Si 8 (O,OH,F) 36 . The similarity of niocalite to woehlerite, hiortdahlite, and livenite is discussed.

Pseudosinhalite is a structural isotype of chondrodite

Abstract Pseudosinhalite, Mg2Al3[O|OH|(BO4)2] and chondrodite, Mg5[(F,OH)2|(SiO4)2] are shown to be isostructural. Compositional and crystallographic relationships between members of the forsteriteclinohumite polysomatic series and their borate isotypes are demonstrated

Procedimentos envolvendo a Comissão de Novos Minerais da IMA, e diretrizes sobre nomenclatura mineral

Um autor que desejar introduzir um novo nome de mineral naUteratura, ou redefinir, desacreditar ou rebatizar um mineral existente, devera obter aprovacao previa da comissao de Novos Minerais e Nomes de Minerais da IMA. Este artigo esquematiza os procedimentos a serem seguidos na preparacao e . submissao de uma propostas para aprovacao, e descreve como tais propostas slo tratadas pela Comissao. Este artigo tambem inclui decisoes sobre nomenclatura tomadas pela Comissao, e apresenta diretrizes gerais sobre nomenclatura mineral. Listas de nomes de minerais desacreditados pela Comissao e de nomes de minerais de terras raras recentemente aprovados sao anexadas.