Korshunovskite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Korshunovskite
Formula:
Mg2Cl(OH)3 · 4H2O
Colour:
Colorless
Hardness:
2
Specific Gravity:
1.798
Crystal System:
Triclinic
Name:
Named for the Korshunovskoye iron deposit, Russia, the type locality.
This page provides mineralogical data about Korshunovskite.
Unique Identifiers
Mindat ID:
2256
Long-form identifier:
mindat:1:1:2256:5
GUID
(UUID V4):
(UUID V4):
e452298e-23ba-4eea-9b91-41cafc85fbf7
IMA Classification of Korshunovskite
Approved
First published:
1982
Classification of Korshunovskite
3.BD.15
3 : HALIDES
B : Simple halides, with H2O
D : Simple halides with H2O and additional OH
3 : HALIDES
B : Simple halides, with H2O
D : Simple halides with H2O and additional OH
10.1.5.1
10 : OXYHALIDES AND HYDROXYHALIDES
1 : A2(O,OH)3Xq
10 : OXYHALIDES AND HYDROXYHALIDES
1 : A2(O,OH)3Xq
8.4.4
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
4 : Halides of the alkaline earths and Mg
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
4 : Halides of the alkaline earths and Mg
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 |
|---|---|---|
| Kss | 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 Korshunovskite
Transparency:
Transparent
Colour:
Colorless
Streak:
White
Hardness:
2 on Mohs scale
Density:
1.798(2) g/cm3 (Measured) 1.787 g/cm3 (Calculated)
Optical Data of Korshunovskite
Type:
Biaxial (-)
RI values:
nα = 1.516(1) nβ = 1.538(1) nγ = 1.547(1)
2V:
Measured: 62° , Calculated: 64°
Max Birefringence:
δ = 0.031
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:
none
Chemistry of Korshunovskite
Mindat Formula:
Mg2Cl(OH)3 · 4H2O
Elements listed:
Crystallography of Korshunovskite
Crystal System:
Triclinic
Cell Parameters:
a = 8.64(3) Å, b = 6.25(1) Å, c = 7.42(1) Å
α = 101.4(3)°, β = 103.9(1)°, γ = 72.7(6)°
α = 101.4(3)°, β = 103.9(1)°, γ = 72.7(6)°
Ratio:
a:b:c = 1.382 : 1 : 1.187
Unit Cell V:
367.89 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Elongated prismatic
Comment:
Triclinic. Point Group: n.d.; Space Group: n.d.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0009151 | Korshunovskite | de Wolff P M, Walter-Levy L (1953) The crystal structure of Mg2(OH)3(Cl,Br)*4H2O Acta Crystallographica 6 40-44 |  | 1953 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.04 Å | (100) |
| 4.032 Å | (70) |
| 3.843 Å | (70-80) |
| 2.873 Å | (60b) |
| 2.703 Å | (60) |
| 2.439 Å | (90-100) |
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) |
Type Occurrence of Korshunovskite
General Appearance of Type Material:
Elongated prismatic grains, tenths of a mm long, in veinlets 1-2 mm wide, in dolomitic marble.
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Moscow, Russia.
Geological Setting of Type Material:
Iron ore deposit.
Associated Minerals at Type Locality:
Reference:
Malinko, S.V., Lisitsyn, A.E., Purusova, S.P., Fitsev, B.P., Khruleva, T.A. (1982) Korshunovskite, Mg2Cl(OH)3·nH2O, a new hydrous magnesium chloride. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 111(3): 324-329.
Synonyms of Korshunovskite
Other Language Names for Korshunovskite
German:Korshunovskit
Korshunskit
Korshunskit
Spanish:Korshunovskita
Korshunskita
Korshunskita
Related Minerals - Strunz-mindat Grouping
| 3.BD.05 | Cadwaladerite | Al5(H2O)3(OH)12 · n(Cl,H2O) |
| 3.BD.20 | Nepskoeite | Mg4Cl(OH)7 · 6H2O |
| 3.BD.25 | Koenenite | Na4Mg9Al4Cl12(OH)22 |
Other Information
Thermal Behaviour:
Weak endothermic effect at 87° and a strong one at 198° (total loss of weight 23.88%), a weak one at 383° and a strong one at 447°C. At 1000° the residue is MgO.
Notes:
Slowly soluble in water, readily soluble in weak acids.
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 Korshunovskite
mindat.org URL:
https://www.mindat.org/min-2256.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 Korshunovskite
Localities for Korshunovskite
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.
Canada | |
| Shang (2000) |
Poland | |
| Łukasz Kruszewski (2012) |
Russia (TL) | |
| The Mineralogical Record: 32: 500. +2 other references |
Quick NavTopAbout KorshunovskiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesStrunz-MindatOther InformationInternet Links References Localities Locality List
Korshunovskoye iron deposit, Zheleznogorsk-Ilimsky, Nizhneilimsky District, Irkutsk Oblast, Russia