New minerals and nomenclature modifications approved in 2019 | Mineralogical Magazine | Cambridge Core (original) (raw)

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IMA Commission on New Minerals, Nomenclature and Classification (CNMNC)

Copyright

Copyright © Mineralogical Society of Great Britain and Ireland 2019

The information given here is provided by the IMA Commission on New Minerals, Nomenclature and Classification for comparative purposes and as a service to mineralogists working on new species.

Each mineral is described in the following format:

Mineral name, if the authors agree on its release prior to the full description appearing in press

Chemical formula

Type locality

Full authorship of proposal

E-mail address of corresponding author

Relationship to other minerals

Crystal system, Space group; Structure determined, yes or no

Unit-cell parameters

Strongest lines in the powder X-ray diffraction pattern

Type specimen repository and specimen number

Citation details for the mineral prior to publication of full description

Citation details concern the fact that this information will be published in the Mineralogical Magazine on a routine basis, as well as being added month by month to the Commission's web site.

It is still a requirement for the authors to publish a full description of the new mineral.

NO OTHER INFORMATION WILL BE RELEASED BY THE COMMISSION

NEW MINERAL PROPOSALS APPROVED IN OCTOBER 2019

IMA No. 2018-112

IMA No. 2018-168

IMA No. 2019-052

IMA No. 2019-053

IMA No. 2019-055

IMA No. 2019-056

IMA No. 2019-057

IMA No. 2019-058

IMA No. 2019-059

IMA No. 2019-060

IMA No. 2019-061

IMA No. 2019-062

IMA No. 2019-064

IMA No. 2019-065

IMA No. 2019-068

IMA No. 2019-072

IMA No. 2018-117b

NEW MINERAL PROPOSALS APPROVED IN NOVEMBER 2019

IMA No. 2019-034

IMA No. 2019-051

IMA No. 2019-054

IMA No. 2019-073

IMA No. 2019-075

IMA No. 2019-076

IMA No. 2019-077

IMA No. 2019-079

IMA No. 2019-080

IMA No. 2019-081

IMA No. 2018-125a

IMA No. 2018-149a

NOMENCLATURE/CLASSIFICATION PROPOSALS APPROVED IN OCTOBER 2019

IMA 19-E: Revalidation of dienerite

Proposal 19-E is accepted, and the mineral dienerite is revalidated. This species shows an ideal chemical formula Ni3As, with a = 9.6206(9) Å, space group I $\overline 4 $3_d_. It is isotypic with domeykite, Cu3As, and the neotype sample is deposited in the collections of the Museo di Storia Naturale, Università di Firenze, Italy, under the catalogue number 3364/I.

IMA 19-F: Redefinition of coquimbite

Proposal 19-F is accepted, and coquimbite is redefined as AlFe3(SO4)6(H2O)12·6H2O (Z = 2). Neotype material is the sample studied by Fang and Robinson (1970) from the Tierra Amarilla (the original type locality described by Rose, 1833) and kept in the U.S. National Museum, Washington DC, USA, catalogue number 12548. In order to be compared with coquimbite, the chemical formulae of paracoquimbite and aluminocoquimbite are also redefined as Fe4(SO4)6(H2O)12·6H2O (Z = 6) and Al2Fe2(SO4)6(H2O)12·6H2O (Z = 2), respectively. Coquimbite and paracoquimbite are characterised by homeotypic structures, so they constitute the ‘coquimbite group’. Aluminocoquimbite, characterised by a different topology, does not belong to the coquimbite group.

NOMENCLATURE/CLASSIFICATION PROPOSALS APPROVED IN NOVEMBER 2019

Revision of the ideal formula of ktenasite

After the approval of fehrite, MgCu4(SO4)2(OH)6·6H2O (IMA No. 2018-125a; see above), the ideal formula of the related mineral ktenasite is modified from (Cu,Zn)5(SO4)2(OH)6·6H2O to ZnCu4(SO4)2(OH)6·6H2O. This is an executive decision taken by the CNMNC.

Revision of the ideal formula of leisingite

The mineral leisingite has been always assumed to have chemical formula CuMg2Te6+O6·6H2O. A careful reading of the papers with the description of the new mineral and of its crystal structure [Mineral. Mag. 60 (1996), 653–657; Can. Mineral. 35 (1997), 759–763], made it clear that Cu is by far the dominant cation at the 2_c_ site, whereas Mg is the dominant cation at the 1_b_ site. Therefore the formula must be changed to Cu2MgTe6+O6·6H2O. Thanks to Owen Missen for spotting it.