Kogarkoite
A valid IMA mineral species
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About Kogarkoite
Lia N. Kogarko
Formula:
Na3(SO4)F
Colour:
White, pale blue, pale pink
Lustre:
Vitreous, Dull
Hardness:
3½
Specific Gravity:
2.66
Crystal System:
Monoclinic
Name:
Named in honor of Lia Nikolaevna Kogarko (Лия Николаевна Когарко) (b. 17 May 1936, Moscow, USSR), Russian geochemist at the Department of Earth Sciences, Russian Academy of Sciences (RAS). She first found the mineral, naming it 'chlorine-free schairerite'.
Has low solubility at high temperatures in the presence of water vapor.
Unique Identifiers
Mindat ID:
2236
Long-form identifier:
mindat:1:1:2236:7
IMA Classification of Kogarkoite
Approved
IMA Formula:
Na3S6+O4F
Approval year:
1970
First published:
1973
Classification of Kogarkoite
7.BD.15
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
D : With only large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
D : With only large cations
30.1.6.1
30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq, where m:p>2:1
30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq, where m:p>2:1
26.1
26 : Sulphates with Halide
26 : Sulphates with Halide
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 |
|---|---|---|
| Kog | 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 Kogarkoite
Vitreous, Dull
Transparency:
Transparent, Translucent
Colour:
White, pale blue, pale pink
Streak:
White
Hardness:
3½ on Mohs scale
Density:
2.66(6) g/cm3 (Measured) 2.676 g/cm3 (Calculated)
Comment:
Calculated density from Fanfani et al. (1980).
Optical Data of Kogarkoite
Type:
Biaxial (+)
RI values:
nα = 1.439(1) nβ = 1.439(1) nγ = 1.442(1)
2V:
Measured: Nearly 0°
Birefringence:
0.0029(3), determined by Berek compensator on two synthetic crystals, 0.36 and 0.33 mm thick.
Max. Birefringence:
δ = 0.003
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:
dispersion not observed
Pleochroism:
Weak
Comments:
Very nearly uniaxial
Chemistry of Kogarkoite
Mindat Formula:
Na3(SO4)F
Element Weights:
Elements listed:
Crystallography of Kogarkoite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 18.079(2) Å, b = 6.958(1) Å, c = 11.443(2) Å
β = 107.71°
β = 107.71°
Ratio:
a:b:c = 2.598 : 1 : 1.645
Unit Cell V:
1371.24 ų
Z:
12
Twinning:
Common, by rotation about [102] (or pseudohexagonal [0001]), giving intergrown and contact trillings.
Comment:
Cell parameters from Fanfani et al. (1980). Note that a=18.074 in abstract but 18.079 in body.
Crystal Structure
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2x2x2 | 3x3x3 | 4x4x4
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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) |
|---|---|---|---|---|---|---|---|
| 0014471 | Kogarkoite | Fanfani L, Giuseppetti G, Tadini C, Zanazzi P F (1980) The crystal structure of kogarkoite, Na3SO4F Mineralogical Magazine 43 753-759 |  | 1980 | Mt Princeton, Colorado, USA | 0 | 293 |
| 0000305 | Kogarkoite | Pabst A, Sharp W N (1973) Kogarkoite, a new natural phase in the system Na2SO4 - NaF - NaCl American Mineralogist 58 116-127 | | 1973 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.48 Å | (100) |
| 2.991 Å | (85) |
| 2.718 Å | (85) |
| 2.705 Å | (85) |
| 2.1419 Å | (85) |
| 3.80 Å | (70) |
| 2.564 Å | (70) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3b: Earth’s earliest hydrosphere | >4.45 |
| 14 : Hot springs, geysers, and other subaerial geothermal minerals | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks | |
| Stage 7: Great Oxidation Event | <2.4 |
| 45a : [Sulfates, arsenates, selenates, antimonates] | |
| 45b : [Other oxidized fumarolic minerals] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 55 : Anthropogenic mine minerals |
Type Occurrence of Kogarkoite
General Appearance of Type Material:
Pale blue grains and aggregates occupying interstices between nepheline and feldspar.
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 127420, 128029, 128030.
Geological Setting of Type Material:
In nepheline syenite pegmatite (at Lovozero).
Associated Minerals at Type Locality:
Synonyms of Kogarkoite
Other Language Names for Kogarkoite
Common Associates
Associations Based on Photo Data:
| 2 photos of Kogarkoite associated with Villiaumite | NaF |
| 1 photo of Kogarkoite associated with 'Hackmanite' | Na8Al6Si6O24Cl2 |
| 1 photo of Kogarkoite associated with Tugtupite | (BeAlSi)Na4(SiO4)3Cl |
| 1 photo of Kogarkoite associated with Thermonatrite | Na2CO3 · H2O |
Related Minerals - Strunz-mindat Grouping
| 7.BD. | Hasanovite | KNa(MoO2)(SO4)2 |
| 7.BD. | Kennygayite | [Pb4O2(OH)2](SO4) |
| 7.BD. | Adanite | Pb2(Te4+O3)(SO4) |
| 7.BD. | Cadsulfohite | Cd2(SO4)(OH)2 |
| 7.BD. | Hyblerite | Pb4Bi2(SO4)2(CO3)O4 |
| 7.BD. | Zanelliite | PbCu9[AsO3.5(OH)0.5]2(AsO4)2(OH)9(H2O)3 |
| 7.BD. | Evanichite | Pb6Cr3+(Cr6+O4)2(SO4)(OH)7FCl |
| 7.BD.05 | Sulphohalite | Na6(SO4)2FCl |
| 7.BD.10 | Galeite | Na15(SO4)5F4Cl |
| 7.BD.10 | Schairerite | Na21(SO4)7ClF6 |
| 7.BD.20 | Aiolosite | Na4Bi(SO4)3Cl |
| 7.BD.20 | Caracolite | Na3Pb2(SO4)3Cl |
| 7.BD.20 | Cesanite | Na3Ca2(SO4)3(OH) |
| 7.BD.25 | Burkeite | Na6(CO3)(SO4)2 |
| 7.BD.30 | Hanksite | Na22K(SO4)9(CO3)2Cl |
| 7.BD.35 | Cannonite | Bi2(SO4)O(OH)2 |
| 7.BD.40 | Lanarkite | Pb2(SO4)O |
| 7.BD.45 | Grandreefite | Pb2(SO4)F2 |
| 7.BD.50 | Itoite | Pb3Ge4+(SO4)2O2(OH)2 |
| 7.BD.55 | Chiluite | Bi3Te6+Mo6+O10.5 |
| 7.BD.60 | Hectorfloresite | Na9(SO4)4(IO3) |
| 7.BD.65 | Pseudograndreefite | Pb6(SO4)F10 |
| 7.BD.70 | Sundiusite | Pb10(SO4)O8Cl2 |
Fluorescence of Kogarkoite
Fluoresces cream to pale blue under SW UV and green under LW UV.
Other Information
Thermal Behaviour:
Melting point 781 °C.
Notes:
Slowly soluble in H2O.
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 Kogarkoite
mindat.org URL:
https://www.mindat.org/min-2236.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Kogarkoite
Reference List:
Pabst, A., Sawyer, D. L., Switzer, George (1963) Galeite and related phases in the system Na2SO4-NaF-NaCl. American Mineralogist, 48 (5-6) 485-510
Pabst, Adolf, Sharp, and William N. (1973) Kogarkoite, a new natural phase in the system Na2SO4-NaF-NaCl. American Mineralogist, 58 (1-2) 116-127
Fanfani, L., Giuseppetti, G., Tadini, C., Zanazzi, P. F. (1980) The crystal structure of kogarkoite, Na3SO4F. Mineralogical Magazine, 43 (330) 753-759 doi:10.1180/minmag.1980.043.330.08
Žáček, V., Rapprich, V., Šíma, J., Škoda, R., Laufek, F., Legesa, F. (2015) Kogarkoite, Na3(SO4)F, from the Shalo hot spring, Main Ethiopian Rift: implications for F-enrichment of thermal groundwater related to alkaline silicic volcanic rocks. Journal of GEOsciences, 60 (3) 171-179
Localities for Kogarkoite
Showing 18 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.
Canada | |
| Horváth et al. (1990) +1 other reference |
Costa Rica | |
| Rodríguez et al. (2017) |
Ethiopia | |
| Žáček et al. (2015) |
Italy | |
| Dr. A. Matthies Minerals |
Japan | |
| Seki et al. (1987) |
Kenya | |
| Forti et al. (2004) |
Poland | |
| Cu +2 other references |
Russia | |
| Solotchin et al. (2015) |
| Kogarko (1961) +2 other references |
| Khomyakov et al. (1992) +1 other reference |
| Sharygin et al. (2008) |
South Africa | |
| Giuliani et al. (2012) |
Tanzania | |
| Nielsen (1999) |
| Mitchell (2006) | |
USA | |
| Bull. Soc. Franç. Minéralo. ... |
| Eckel et al. (1997) | |
| Northrop et al. (1996) |
Zambia | |
| Van Ranst et al. (2008) |
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Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada