Krasnoshteinite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
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
GUID
(UUID V4):
(UUID V4):
90479fa0-4606-4484-bf28-876855d395f0
IMA Classification of Krasnoshteinite
Approved
Approval year:
2018
First published:
2020
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 |
|---|---|---|
| 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
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r>v
Pleochroism:
Non-pleochroic
Chemistry of Krasnoshteinite
Mindat Formula:
Al8[B2O4(OH)2](OH)16Cl4 · 7H2O
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) |
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, I.V., Zubkova, N.V., Chaikovskiy, I.I., Chirkova, E.P., Belakovskiy, D.I., Yapaskurt, V.O., Bychkova, Y.V., Lykova, I., Britvin, S.N., Pushcharovsky, D.Y. (2020) Krasnoshteinite, Al8[B2O4(OH)2](OH)16Cl4⋅7H2O, a New Microporous Mineral with a Novel Type of Borate Polyanion. Crystals: 10(4): 301.
Synonyms of Krasnoshteinite
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:
Localities for Krasnoshteinite
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) | |
|
Quick NavTopAbout KrasnoshteiniteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsFluorescence Other InformationInternet Links References Localities Locality List
Borehole No. 2001, Romanovskiy area, Verkhnekamskoe K deposit, Solikamsk, Solikamsky District, Perm Krai, Russia