Krasnoshteinite
A valid IMA mineral species
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About Krasnoshteinite
Formula:
Al8[B2O4(OH)2](OH)16Cl4 · 7H2O
Colour:
colorless
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
2.11
Crystal System:
Monoclinic
Name:
Named in honor of Arkadiy Evgenievich Krasnoshtein (1937–2009), Russian mining engineer and scientist.
New structure type.
Unique Identifiers
Mindat ID:
53190
Long-form identifier:
mindat:1:1:53190:4
IMA Classification of Krasnoshteinite
Approved
IMA Formula:
Al8[B2O4(OH)2](OH)16Cl4·7H2O
Approval year:
2018
First published:
2020
Type description reference:
Pekov, Igor V., Zubkova, Natalia V., Chaikovskiy, Ilya I., Chirkova, Elena P., Belakovskiy, Dmitry I., Yapaskurt, Vasiliy O., Bychkova, Yana V., Lykova, Inna, Britvin, Sergey N., Pushcharovsky, Dmitry Yu. (2020) Krasnoshteinite, Al8[B2O4(OH)2](OH)16Cl4⋅7H2O, a New Microporous Mineral with a Novel Type of Borate Polyanion. Crystals, 10 (4) 301 doi:10.3390/cryst10040301
Classification of Krasnoshteinite
6.B0.05
6 : BORATES
B : Diborates
0 :
6 : BORATES
B : Diborates
0 :
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 |
|---|---|---|
| Knh | 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 Krasnoshteinite
Vitreous
Transparency:
Transparent
Colour:
Colorless
Streak:
White
Hardness:
3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
perfect cleavage on {010} and an imperfect cleavage on {100}.
perfect cleavage on {010} and an imperfect cleavage on {100}.
Fracture:
Step-Like
Density:
2.11(1) g/cm3 (Measured) 2.115 g/cm3 (Calculated)
Optical Data of Krasnoshteinite
Type:
Biaxial (+)
RI values:
nα = 1.563(2) nβ = 1.565(2) nγ = 1.574(2)
2V:
Measured: 50° (10), Calculated: 51°
Max. Birefringence:
δ = 0.011
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
Dispersion:
r>v
Pleochroism:
Non-pleochroic
Chemistry of Krasnoshteinite
Mindat Formula:
Al8[B2O4(OH)2](OH)16Cl4 · 7H2O
Element Weights:
Crystallography of Krasnoshteinite
Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
P21
Setting:
P21
Cell Parameters:
a = 8.7398(2) Å, b = 8.7398(3) Å, c = 11.3060(3) Å
β = 106.665(2)°
β = 106.665(2)°
Ratio:
a:b:c = 1 : 1 : 1.294
Unit Cell V:
827.33 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.81 Å | (41) |
| 8.65 Å | (26) |
| 8.38 Å | (67) |
| 7.22 Å | (100) |
| 5.452 Å | (22) |
| 3.720 Å | (19) |
| 3.610 Å | (21) |
| 3.019 Å | (22) |
Reference:
Pekov, Igor V., Zubkova, Natalia V., Chaikovskiy, Ilya I., Chirkova, Elena P., Belakovskiy, Dmitry I., Yapaskurt, Vasiliy O., Bychkova, Yana V., Lykova, Inna, Britvin, Sergey N., Pushcharovsky, Dmitry Yu. (2020) Krasnoshteinite, Al8[B2O4(OH)2](OH)16Cl4⋅7H2O, a New Microporous Mineral with a Novel Type of Borate Polyanion. Crystals, 10 (4) 301 doi:10.3390/cryst10040301
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| 25 : Evaporites (prebiotic) |
Type Occurrence of Krasnoshteinite
General Appearance of Type Material:
separate tabular to lamellar crystals of up to 0.06 × 0.25 × 0.3 mm and their parallel intergrowths embedded in carnallite and halite.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5239/1
Geological Setting of Type Material:
Evaporite deposit
Associated Minerals at Type Locality:
Reference:
Pekov, Igor V., Zubkova, Natalia V., Chaikovskiy, Ilya I., Chirkova, Elena P., Belakovskiy, Dmitry I., Yapaskurt, Vasiliy O., Bychkova, Yana V., Lykova, Inna, Britvin, Sergey N., Pushcharovsky, Dmitry Yu. (2020) Krasnoshteinite, Al8[B2O4(OH)2](OH)16Cl4⋅7H2O, a New Microporous Mineral with a Novel Type of Borate Polyanion. Crystals, 10 (4) 301 doi:10.3390/cryst10040301
Synonyms of Krasnoshteinite
Other Language Names for Krasnoshteinite
Dutch:Krasnoshteiniet
German:Krasnoshteinit
Fluorescence of Krasnoshteinite
None
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 Krasnoshteinite
mindat.org URL:
https://www.mindat.org/min-53190.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Krasnoshteinite
Reference List:
Hålenius, Ulf, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2018) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) NEWSLETTER 46. European Journal of Mineralogy, 30 (6) 1181-1189 doi:10.1127/ejm/2018/0030-2819
Pekov, Igor V., Zubkova, Natalia V., Chaikovskiy, Ilya I., Chirkova, Elena P., Belakovskiy, Dmitry I., Yapaskurt, Vasiliy O., Bychkova, Yana V., Lykova, Inna, Britvin, Sergey N., Pushcharovsky, Dmitry Yu. (2020) Krasnoshteinite, Al8[B2O4(OH)2](OH)16Cl4⋅7H2O, a New Microporous Mineral with a Novel Type of Borate Polyanion. Crystals, 10 (4) 301 doi:10.3390/cryst10040301
Localities for Krasnoshteinite
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) | |
| Hålenius et al. (2018) +1 other reference |
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Borehole No. 2001, Romanovskiy area, Verkhnekamskoe K deposit, Solikamsk, Solikamsky District, Perm Krai, Russia