Nishanbaevite
A valid IMA mineral species
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About Nishanbaevite
Formula:
KAl2O(AsO4)(SO4)
Colour:
Colourless in individuals and snow-white in aggregates.
Lustre:
Vitreous
Specific Gravity:
3.011 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in honor Russian mineralogist Tursun Prnazorovich Nishanbaev (Нишанбаев Турсун Прназорович) (1955–2017) a Head of the Natural History Museum of the Ilmen Natural Reserve, Miass, Russia.
Unique combination of elements. New structure type. In terms of represeting a natural Al oxyarsenate it is similar to wrightite (chemically most close to nishanbaevite), alumoedtollite, dmisokolovite, and urusovite.
The arsenate and sulfate anions in nishanbaevite are ordered, i.e, they do not substitute for each other in a common structural site.
Structure details:
* the complex heteropolyhedral sheet comprises zig-zag chains of Al-centred polyhedra;
* these polyhedra are alternating AlO5 trigonal bipyramids and AlO6 octahedra; they share edges;
* adjacent Al-bearing chains are linked via arsenate tetrahedra, thus forming heteropolyhedral double-layer;
* the (K,Na) site is in the interlayer space, between the sulfate tetrahedra.
The arsenate and sulfate anions in nishanbaevite are ordered, i.e, they do not substitute for each other in a common structural site.
Structure details:
* the complex heteropolyhedral sheet comprises zig-zag chains of Al-centred polyhedra;
* these polyhedra are alternating AlO5 trigonal bipyramids and AlO6 octahedra; they share edges;
* adjacent Al-bearing chains are linked via arsenate tetrahedra, thus forming heteropolyhedral double-layer;
* the (K,Na) site is in the interlayer space, between the sulfate tetrahedra.
Unique Identifiers
Mindat ID:
53676
Long-form identifier:
mindat:1:1:53676:9
IMA Classification of Nishanbaevite
Approved
IMA Formula:
KAl2O(As5+O4)(S6+O4)
Approval year:
2019
First published:
2023
Type description reference:
Pekov, Igor V., Zubkova, Natalia V., Yapaskurt, Vasiliy O., Belakovskiy, Dmitry I., Britvin, Sergey N., Agakhanov, Atali A., Turchkova, Anna G., Sidorov, Evgeny G., Kutyrev, Anton V., Blatov, Vladislav A., Pushcharovsky, Dmitry Y. (2023) Nishanbaevite, KAl2O(AsO4)(SO4), a new As/S-ordered arsenate-sulfate mineral of fumarolic origin. Mineralogy and Petrology, 117 (2) 247-257 doi:10.1007/s00710-022-00803-0
Classification of Nishanbaevite
8.BK.30
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
K : With medium-sized and large cations, (OH, etc.):RO4 = 2:1, 2.5:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
K : With medium-sized and large cations, (OH, etc.):RO4 = 2:1, 2.5:1
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Nbv | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Nishanbaevite
Vitreous
Transparency:
Transparent
Colour:
Colourless in individuals and snow-white in aggregates.
Streak:
White
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
none
Fracture:
Irregular/Uneven
Density:
3.011 g/cm3 (Calculated)
Optical Data of Nishanbaevite
Type:
Biaxial (-)
RI values:
nα = 1.552 nβ = 1.567 nγ = 1.567
Max. Birefringence:
δ = 0.015
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Pleochroism:
Non-pleochroic
Chemistry of Nishanbaevite
Mindat Formula:
KAl2O(AsO4)(SO4)
Element Weights:
Chemical Analysis
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (K0.57Na0.41Ca0.01)?0.99(Al1.99Fe3+0.02Cu0.01)?2.02(A0.95S0.95Si0.09P0.03)?2.02O9 |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia | by electron microprobe (mean of 7 analytical spots); empirical formula basis: 9 O apfu |
Crystallography of Nishanbaevite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pbcm
Setting:
Pbcm
Cell Parameters:
a = 15.505(5) Å, b = 7.257(2) Å, c = 6.606(2) Å
Ratio:
a:b:c = 2.137 : 1 : 0.91
Unit Cell V:
743.31 ų (Calculated from Unit Cell)
Z:
4
Twinning:
X-shaped interpenetration twins
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 15.49 Å | (100) |
| 6.56 Å | (30) |
| 4.653 Å | (29) |
| 3.881 Å | (54) |
| 3.625 Å | (27) |
| 3.289 Å | (52) |
| 3.113 Å | (29) |
| 3.038 Å | (51) |
Reference:
Pekov, Igor V., Zubkova, Natalia V., Yapaskurt, Vasiliy O., Belakovskiy, Dmitry I., Britvin, Sergey N., Agakhanov, Atali A., Turchkova, Anna G., Sidorov, Evgeny G., Kutyrev, Anton V., Blatov, Vladislav A., Pushcharovsky, Dmitry Y. (2023) Nishanbaevite, KAl2O(AsO4)(SO4), a new As/S-ordered arsenate-sulfate mineral of fumarolic origin. Mineralogy and Petrology, 117 (2) 247-257 doi:10.1007/s00710-022-00803-0
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 45a : [Sulfates, arsenates, selenates, antimonates] |
Type Occurrence of Nishanbaevite
General Appearance of Type Material:
Long-prismatic or lamellar crystals, up to 0.03 mm, usually intergrown to form brush-like aggregates and crusts, up to 1.5 mm across.
Place of Conservation of Type Material:
Collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5379/1.
Geological Setting of Type Material:
Volcanic (de)sublimates.
Associated Minerals at Type Locality:
Reference:
Pekov, Igor V., Zubkova, Natalia V., Yapaskurt, Vasiliy O., Belakovskiy, Dmitry I., Britvin, Sergey N., Agakhanov, Atali A., Turchkova, Anna G., Sidorov, Evgeny G., Kutyrev, Anton V., Blatov, Vladislav A., Pushcharovsky, Dmitry Y. (2023) Nishanbaevite, KAl2O(AsO4)(SO4), a new As/S-ordered arsenate-sulfate mineral of fumarolic origin. Mineralogy and Petrology, 117 (2) 247-257 doi:10.1007/s00710-022-00803-0
Synonyms of Nishanbaevite
Other Language Names for Nishanbaevite
Dutch:Nishanbaeviet
German:Nishanbaevit
Related Minerals - Strunz-mindat Grouping
| 8.BK.05 | Brazilianite | NaAl3(PO4)2(OH)4 |
| 8.BK.10 | Neustädtelite | Bi2Fe3+(Fe3+,Co)(AsO4)2(O,OH)4 |
| 8.BK.10 | Cobaltneustädtelite | Bi2Fe3+(Co,Fe3+)(AsO4)2(O,OH)4 |
| 8.BK.10 | Medenbachite | Bi2Fe3+Cu2+(AsO4)2O(OH)3 |
| 8.BK.15 | Curetonite | Ba(Al,Ti)(PO4)(OH,O)F |
| 8.BK.20 | Heyite | Pb5Fe2+2(VO4)2O4 |
| 8.BK.25 | Jamesite | Pb2Zn(Fe2+,Zn)2Fe3+4(AsO4)4(OH)10 |
| 8.BK.25 | Lulzacite | Sr2Fe2+(Fe2+,Mg)2Al4(PO4)4(OH)10 |
| 8.BK.25 | Désorite | Pb2(Fe3+6Zn)O2(PO4)4(OH)8 |
| 8.BK.35 | Zircarsite | Na18Cu12ZrO8(AsO4)8Cl6 |
| 8.BK.35 | Arsmirandite | Na18Cu12Fe3+O8(AsO4)8Cl5 |
| 8.BK.35 | Lebedevite | K4Na14Cu14O8(AsO4)8Cl6 |
| 8.BK.35 | Lehmannite | Na18Cu12TiO8(AsO4)8FCl5 |
Radioactivity
Radioactivity:
| Element | % Content | Activity (Bq/kg) | Radiation Type |
|---|---|---|---|
| Uranium (U) | 0.0000% | 0 | α, β, γ |
| Thorium (Th) | 0.0000% | 0 | α, β, γ |
| Potassium (K) | 11.3644% | 3,523 | β, γ |
For comparison:
- Banana: ~15 Bq per fruit
- Granite: 1,000–3,000 Bq/kg
- EU exemption limit: 10,000 Bq/kg
Note: Risk is shown relative to daily recommended maximum exposure to non-background radiation of 1000 µSv/year. Note that natural background radiation averages around 2400 µSv/year so in reality these risks are probably extremely overstated! With infrequent handling and safe storage natural radioactive minerals do not usually pose much risk.
Interactive Simulator:
Note: The mass selector refers to the mass of radioactive mineral present, not the full specimen, also be aware that the matrix may also be radioactive, possibly more radioactive than this mineral!
Activity: –
| Distance | Dose rate | Risk |
|---|---|---|
| 1 cm | ||
| 10 cm | ||
| 1 m |
The external dose rate (D) from a radioactive mineral is estimated by summing the gamma radiation contributions from its Uranium, Thorium, and Potassium content, disregarding daughter-product which may have a significant effect in some cases (eg 'pitchblende'). This involves multiplying the activity (A, in Bq) of each element by its specific gamma ray constant (Γ), which accounts for its unique gamma emissions. The total unshielded dose at 1 cm is then scaled by the square of the distance (r, in cm) and multiplied by a shielding factor (μshield). This calculation provides a 'worst-case' or 'maximum risk' estimate because it assumes the sample is a point source and entirely neglects any self-shielding where radiation is absorbed within the mineral itself, meaning actual doses will typically be lower. The resulting dose rate (D) is expressed in microsieverts per hour (μSv/h).
D = ((AU × ΓU) + (ATh × ΓTh) + (AK × ΓK)) / r2 × μshield
Other Information
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 Nishanbaevite
mindat.org URL:
https://www.mindat.org/min-53676.html
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Please feel free to link to this page.
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References for Nishanbaevite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2020) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) - Newsletter 52. European Journal of Mineralogy, 32 (1) 1-11 doi:10.5194/ejm-32-1-2020
Pekov, Igor V., Zubkova, Natalia V., Yapaskurt, Vasiliy O., Belakovskiy, Dmitry I., Britvin, Sergey N., Agakhanov, Atali A., Turchkova, Anna G., Sidorov, Evgeny G., Kutyrev, Anton V., Blatov, Vladislav A., Pushcharovsky, Dmitry Y. (2023) Nishanbaevite, KAl2O(AsO4)(SO4), a new As/S-ordered arsenate-sulfate mineral of fumarolic origin. Mineralogy and Petrology, 117 (2) 247-257 doi:10.1007/s00710-022-00803-0
Localities for Nishanbaevite
Showing 1 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Russia (TL) | |
| Miyawaki et al. (2019) +1 other reference |
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Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia