Korzhinskite
A valid IMA mineral species
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About Korzhinskite
Dmitri S. Korzhinskii
Formula:
Ca(B2O4) · H2O
Colour:
Colorless
Crystal System:
Monoclinic
Name:
Named in honor of Dmitri Sergeevich Korzhinskii (Дмитрий Сергеевич Коржинский)(13 (1 old style) September 1899, St. Petersburg, Russian Empire – 16 December 1985, Moscow, USSR), petrologist, Institute of Geology of Ore Deposits, Petrology, Mineralogy, and Geochemistry, Moscow, Russia. He was awarded, among other things, the 1980 Roebling medal. His contributions included developing theory for metamorphic reactions involving a gas phase, and open systems.
Unique Identifiers
Mindat ID:
2257
Long-form identifier:
mindat:1:1:2257:2
IMA Classification of Korzhinskite
Approved
IMA Formula:
CaB2O4·0.5H2O
First published:
1963
Classification of Korzhinskite
6.GA.30
6 : BORATES
G : Heptaborates and other megaborates
A : Tekto-heptaborates
6 : BORATES
G : Heptaborates and other megaborates
A : Tekto-heptaborates
26.7.1.1
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
9.3.8
9 : Borates
3 : Borates of Ca and Sr
9 : Borates
3 : Borates of Ca and Sr
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 |
|---|---|---|
| Kzh | 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 Korzhinskite
Transparency:
Transparent
Colour:
Colorless
Streak:
White
Cleavage:
Imperfect/Fair
One, parallel elongation
One, parallel elongation
Optical Data of Korzhinskite
Type:
Biaxial (+)
RI values:
nα = 1.642(1) nβ = 1.647(1) nγ = 1.672(1)
2V:
Measured: 43° , Calculated: 50°
Max. Birefringence:
δ = 0.030
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:
relatively weak
Optical Extinction:
Parallel. X ⊥ cleavage, Y = Z = ‖ cleavage.
Chemistry of Korzhinskite
Mindat Formula:
Ca(B2O4) · H2O
Element Weights:
Elements listed:
Crystallography of Korzhinskite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P2/m
Setting:
P2/m
Cell Parameters:
a = 4.33 Å, b = 6.47 Å, c = 10.08 Å
β = 85(2)°
β = 85(2)°
Ratio:
a:b:c = 0.669 : 1 : 1.558
Unit Cell V:
281.32 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.02 Å | (100) |
| 3.11 Å | (70) |
| 2.81 Å | (70) |
| 1.905 Å | (50) |
| 1.800 Å | (50) |
| 1.757 Å | (40) |
| 2.70 Å | (30) |
Locality:
Comments:
Novofrolovskoye deposit, Russia. The data are from the type description.
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 Korzhinskite
General Appearance of Type Material:
Lamellar aggregates of grains of prismatic habit.
Place of Conservation of Type Material:
Vernadsky Geological Museum, Moscow, Russia, number 48612.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, number 72025.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, number 72025.
Geological Setting of Type Material:
Skarn.
Associated Minerals at Type Locality:
Other Language Names for Korzhinskite
Related Minerals - Strunz-mindat Grouping
| 6.GA.05 | Ericaite | Fe2+3(B7O13)Cl |
| 6.GA.05 | Chambersite | Mn2+3(B7O13)Cl |
| 6.GA.05 | Boracite | Mg3(B7O13)Cl |
| 6.GA.10 | Congolite | Fe2+3B7O13Cl |
| 6.GA.10 | Trembathite | Mg3B7O13Cl |
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 Korzhinskite
mindat.org URL:
https://www.mindat.org/min-2257.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Korzhinskite
Localities for Korzhinskite
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) | |
| American Mineralogist: 82: 822. +2 other references |
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Novofrolovskoye B-Cu deposit, Tur'insk, Turya river, Serovsky District, Sverdlovsk Oblast, Russia