Natrobistantite studied by Voloshin et al. (1983) and by Beurlen et al. (2005) are both a zero valent dominant member of the microlite group with significant contents (in wt.%) of bismuth and cesium.
According to modern microprobe data at least part of Natrobistantite specimens are Hydroxynatromicrolite.

Unique IdentifiersHide

Mindat ID:

2852 (as Natrobistantite)
2705 (as Microlite Group)

Long-form identifier:

mindat:1:1:2852:9 (as Natrobistantite)
mindat:1:1:2705:8 (as Microlite Group)

IMA Classification of NatrobistantiteHide

IMA status:

Discredited

First published:

1983

Approval history:

Approved as a new mineral by IMA in 1982.
Discredited by IMA 2012 (Atencio et al. 2013, 2012 IMA Report)

Classification of NatrobistantiteHide

Hey's CIM Ref.:

18.1.29

18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U

Physical Properties of NatrobistantiteHide

Colour:

Blue-green, yellow-green, colorless

Chemistry of NatrobistantiteHide

Mindat Formula:

(Na,Cs)Bi(Ta,Nb,Sb)₄O₁₂

Original formula

Element Weights:

Element	% weight
Ta	63.062 %
Bi	18.208 %
O	16.728 %
Na	2.003 %

Calculated from ideal end-member formula.

Elements listed:

Bi, Cs, Na, Nb, O, Sb, Ta - search for minerals with similar chemistry

Crystallography of NatrobistantiteHide

Crystal System:

Isometric

First Recorded Occurrence of NatrobistantiteHide

First Recorded Locality:

ⓘ Koktokay pegmatite field (Keketuohai pegmatite field), Fuyun Co. (Koktokay Co.), Altay Prefecture (Aletai Prefecture), Ili Kazakh Autonomous Prefecture, Xinjiang, China

Associated Minerals at First Recorded Locality:

Clinobisvanite

Pucherite

Synonyms of NatrobistantiteHide

IMA1982-016

Other Language Names for NatrobistantiteHide

German:Natrobistantit

Spanish:Natrobistantita

Common AssociatesHide

Associations Based on Photo Data:

2 photos of Natrobistantite associated with Clinobisvanite	Bi(VO₄)
1 photo of Natrobistantite associated with Bismutite	(BiO)₂CO₃

Fluorescence of NatrobistantiteHide

In UV light:

Colorless grains luminesce red-orange in UV light,colored
varieties do not luminesce.

Other InformationHide

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for NatrobistantiteHide

mindat.org URL:

https://www.mindat.org/min-2852.html
Please feel free to link to this page.

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References for NatrobistantiteHide

Reference List:

Voloshin, A.V., Pakhomovskii, Y.A., Stepanov, V.I., and Tyusheva, E.N. (1983) Natrobistantite (Na,Cs)Bi(Ta,Nb,Sb)4O12 - New mineral from granite pegmatites. Mineralogicheskii Zhurnal 5(2), 82-86 (in Russian with English abstract).

(1984) American Mineralogist 69: 407-408 (abstract).

[1]Clark, A. M. (1993) Hey's Mineral Index - Mineral Species, Varieties and Synonyms (3rd ed.). Natural History Museum.p.483

Beurlen, Hartmut, Soares, Dwight R., Thomas, Rainer, Prado-Borges, Lucila E., Castro, Cláudio de (2005) Mineral chemistry of tantalate species new in the Borborema Pegmatitic Province, Northeast Brazil. Anais da Academia Brasileira de Ciências, 77 (1). 169-182 doi:10.1590/s0001-37652005000100013

Atencio, D., Andrade, M. B., Christy, A. G., Giere, R., Kartashov, P. M. (2010) The pyrochlore supergroup of minerals: nomenclature. The Canadian Mineralogist, 48 (3) 673-698 doi:10.3749/canmin.48.3.673

Christy, A. G., Atencio, D. (2013) Clarification of status of species in the pyrochlore supergroup. Mineralogical Magazine, 77 (1) 13-20 doi:10.1180/minmag.2013.077.1.02

Localities for NatrobistantiteHide

Showing 2 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

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Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Brazil
Rio Grande do Norte Parelhas ⓘ Alto dos Quintos Mine	Beurlen et al. (2005) +1 other reference

China (FRL)
Xinjiang Ili Kazakh Autonomous Prefecture Altay Prefecture (Aletai Prefecture) Fuyun Co. (Koktokay Co.) ⓘ Koktokay pegmatite field (Keketuohai pegmatite field) (FRL)	A. V. Voloshin et al. (1983)

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