Afghanite (original) (raw)

A valid IMA mineral species

About AfghaniteHide

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Formula:

(Na,K)22Ca10(Si24Al24O96)(SO4)6Cl6

Colour:

White, light blue, dark blue

Name:

Named after the country of its discovery, Afghanistan.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:41:9

6f9e1a00-d7ad-4dfc-a023-919dec36009c

IMA Classification of AfghaniteHide

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IMA Formula:

(Na,K)22Ca10(Si24Al24)O96(SO4)6Cl6

Type description reference:

Classification of AfghaniteHide

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9.FB.05

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
B : Tektosilicates with additional anions

76.2.5.1

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species

17.10.12

17 : Silicates Containing other Anions
10 : Silicates with sulphate, molybdate or tungstate

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of AfghaniteHide

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Colour:

White, light blue, dark blue

Comment:

Colourless in thin section

Density:

2.55 g/cm3 (Measured) 2.65 g/cm3 (Calculated)

Optical Data of AfghaniteHide

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RI values:

_n_ω = 1.523 _n_ε = 1.529

δ = 0.006

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Chemistry of AfghaniteHide

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Mindat Formula:

(Na,K)22Ca10(Si24Al24O96)(SO4)6Cl6

Crystallography of AfghaniteHide

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Class (H-M):

3_m_ - Ditrigonal Pyramidal

Cell Parameters:

a = 12.8013(7) Å, c = 21.4119(18) Å

Unit Cell V:

3,038.74 ų (Calculated from Unit Cell)

Morphology:

As stout to slender, thin tabular laths and as rounded grains.

Comment:

Cell data from Ballirano et al. (1996). Previously assumed space group P63mc is incorrect.

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Geological Setting:

In silicified limestone xenoliths in pumice (Pitigliano quarry, Italy).

Type Occurrence of AfghaniteHide

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General Appearance of Type Material:

In thin veinlets cutting lazurite crystals.

Place of Conservation of Type Material:

Mineralogy-Crystallography Laboratory, University Pierre and Marie Curie, Paris;
National School of Mines, Paris, France;
The Natural History Museum, London, England, 1969,72.

Associated Minerals at Type Locality:

Reference:

Bariand,P., Cesbron, F., Giraud, R. (1968) Une nouvelle espèce minérale: l'afghanite de Sar-e-sang, Badakhshan, Afghanistan. Comparaison avec les minéraux du groupe de la cancrinite. Bulletin de la Société Francaise de Minéralogie et Christallographie: 91: 34-42.

Synonyms of AfghaniteHide

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Other Language Names for AfghaniteHide

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Relationship of Afghanite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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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 AfghaniteHide

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References for AfghaniteHide

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Reference List:

Ballirano, Paolo, Bonaccorsi, Elena, Maras, Adriana, Merlino, Stefanο (1996) Crystal structure of afghanite, the eight-layer member of the cancrinite-group: evidence for long-range Si,Al ordering. European Journal of Mineralogy, 9 (1) 21-30 doi:10.1127/ejm/9/1/0021

Localities for AfghaniteHide

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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.

Locality ListHide

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- 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.

Afghanistan
ⓘ Badakhshan	Hogarth (1979)
Kuran wa Munjan District ⓘ Robate Payan	Dudley Blauwet priv. comm. (2008)
Sar-e-Sang ⓘ Ladjuar Medam (TL)	Bariand et al. (1968) +1 other reference
ⓘ Dar-e-Zu mine	Woodside et al. (2014)
ⓘ Sar-e-Sang River	Fernando Camara (2013)
Canada
Nunavut Qikiqtaaluk Region Baffin Island ⓘ Kimmirut (Lake Harbour)	Hogarth (1979)
Germany
Rhineland-Palatinate Mayen-Koblenz Vordereifel ⓘ Bellerberg volcano	Blaß et al. (2003)
Ettringen ⓘ Caspar quarry	Blass et al. (2001)
Italy
Campania Metropolitan City of Naples ⓘ Mount Somma	... +5 other references
ⓘ Latera volcanic complex	in the collection of Luigi Mattei
Lazio Metropolitan City of Rome Capital Magliano Romano ⓘ Fosso Attici	Stoppani et al. (1982)
ⓘ Sacrofano	Parodi et al. (1996)
ⓘ Stracciacappe caldera	Gresta et al. (2002)
Viterbo Province ⓘ Bassano Romano	Stoppani et al. (1982) +1 other reference
ⓘ Farnese	Di Domenico Dario
Gradoli ⓘ Poggio Pinzo (Gradoli pozzolana quarry)	Signoretti et al. (2001)
Onano ⓘ Montenero Quarry	Cresta et al. (2002)
Valentano ⓘ Mt Saliette	Burli et al. (2007)
Vetralla ⓘ Pian di San Martino	Signoretti et al. (2004) +1 other reference
ⓘ Tre Croci	American Mineralogist
ⓘ Villa San Giovanni in Tuscia	Carlini
Viterbo ⓘ Castellaccio di Petrignano	Bill Henderson specimens
ⓘ Le Carcarelle	www.gminromano.it (2005) +1 other reference
ⓘ San Martino al Cimino	Stoppani et al. (1982)
Tuscany Grosseto Province Pitigliano ⓘ Case Collina	Liotti L. (Grosseto)
Russia
Lake Baikal area Slyudyanka Malaya Bystraya River Valley ⓘ Malo-Bystrinskoe lazurite deposit	Hogarth (1979) +1 other reference
ⓘ Tultui lazurite deposit	Pavel.M. Kartashov (n.d.) +2 other references
Tajikistan
Gorno-Badakhshan Shughnon Shakhdara range Badom-Dara ⓘ Lyadzhvardara deposit (Lyadzhvar Dara; Lyajvardara; Luadzhvardara)	Hogarth (1979)
USA
New York St. Lawrence County Edwards ⓘ Edwards Mine (St. Joe Lead)	Hogarth (1979)