Rasvumite
A valid IMA mineral species
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About Rasvumite
Mt. Rasvumchorr and Rasvumchorr mine
Rasvumchorr Mine, Rasvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
Rasvumchorr Mine, Rasvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
Formula:
KFe2S3
Colour:
Steel-gray
Lustre:
Metallic
Hardness:
4 - 5
Specific Gravity:
3.1
Crystal System:
Orthorhombic
Name:
Named after the type locality: Rasvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia.
Co-Type Localities:
Isostructural with:
Partially alters to orange-brown FexSy in open air, within days or hours.
Compare bartonite, gmalimite, djerfisherite, 'Unnamed (K sulfides solid solution)', and UM1997-44-S:FeK.
Compare bartonite, gmalimite, djerfisherite, 'Unnamed (K sulfides solid solution)', and UM1997-44-S:FeK.
Unique Identifiers
Mindat ID:
3369
Long-form identifier:
mindat:1:1:3369:1
GUID
(UUID V4):
(UUID V4):
65d3effe-80eb-438f-ae56-3e7843add3d9
IMA Classification of Rasvumite
Approved
First published:
1970
Classification of Rasvumite
2.FB.20
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
B : With alkalies (without Cl, etc.)
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
B : With alkalies (without Cl, etc.)
2.9.11.1
2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
3.0.4
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
0 : Sulphides etc. of the alkalis
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
0 : Sulphides etc. of the alkalis
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Rsv | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Rsv | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Rasvumite
Metallic
Transparency:
Opaque
Colour:
Steel-gray
Comment:
Turns iridescent purple or bronze, to dull on oxidation.
Hardness:
4 - 5 on Mohs scale
Hardness:
VHN100=33.9 - Vickers
Cleavage:
Perfect
perfect on {110}
perfect on {110}
Density:
3.1 g/cm3 (Measured) 3.029 g/cm3 (Calculated)
Optical Data of Rasvumite
Anisotropism:
Strong
Bireflectance:
Strong
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 16.7% | 30.1% |
| 420nm | 16.9% | 30.5% |
| 440nm | 17.1% | 30.8% |
| 460nm | 17.3% | 30.2% |
| 480nm | 17.5% | 29.6% |
| 500nm | 17.6% | 29.4% |
| 520nm | 17.9% | 29.4% |
| 540nm | 18.1% | 29.4% |
| 560nm | 18.5% | 29.8% |
| 580nm | 19.0% | 30.3% |
| 600nm | 19.6% | 31.0% |
| 620nm | 20.1% | 31.7% |
| 640nm | 20.6% | 32.5% |
| 660nm | 20.8% | 33.2% |
| 680nm | 20.9% | 33.6% |
| 700nm | 21.0% | 33.8% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 33.8%.
R1 shown in black, R2 shown in red
Pleochroism:
Strong
Chemistry of Rasvumite
Mindat Formula:
KFe2S3
Elements listed:
Common Impurities:
Na,Mg,Ca,Cu
Crystallography of Rasvumite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Cmcm
Setting:
Cmcm
Cell Parameters:
a = 9.04 Å, b = 11.01 Å, c = 5.43 Å
Ratio:
a:b:c = 0.821 : 1 : 0.493
Unit Cell V:
540.45 ų (Calculated from Unit Cell)
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0000782 | Rasvumite | Clark J R, Brown G E (1980) Crystal structure of rasvumite, KFe2S3 American Mineralogist 65 477-482 |  | 1980 | 0 | 293 | |
| 0014044 | Rasvumite | Mitchell R H, Ross K C, Potter E G (2004) Crystal structures of CsFe2S3 and RbFe2S3: Synthetic analogs of rasvumite KFe2S3 Journal of Solid State Chemistry 177 1867-1872 | 2004 | synthetic | 0 | 293 | |
| 0014046 | Rasvumite | Mitchell R H, Ross K C, Potter E G (2004) Crystal structures of CsFe2S3 and RbFe2S3: Synthetic analogs of rasvumite KFe2S3 Journal of Solid State Chemistry 177 1867-1872 | 2004 | synthetic | 0 | 293 | |
| 0014047 | Rasvumite | Mitchell R H, Ross K C, Potter E G (2004) Crystal structures of CsFe2S3 and RbFe2S3: Synthetic analogs of rasvumite KFe2S3 Journal of Solid State Chemistry 177 1867-1872 | 2004 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.513 Å | (100) |
| 6.98 Å | (62) |
| 3.403 Å | (43) |
| 3.492 Å | (17) |
| 1.778 Å | (14) |
| 2.935 Å | (12) |
| 2.905 Å | (12) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4a: Earth’s earliest continental crust | >4.4-3.0 |
| 20 : Acidic volcanic rocks | |
| High-𝑇 alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks | |
| 36 : Carbonatites, kimberlites, and related igneous rocks | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47i : [Terrestrial weathering of meteorites] |
Type Occurrence of Rasvumite
Co-Type Localities:
General Appearance of Type Material:
Grains, usually less than a mm in size, but up to 2 mm. The aggregates are composed of very fine, often curved needles. Commonly along grain boundaries of K feldspar, nepheline, and aegirine.
Place of Conservation of Type Material:
Geology Museum, Kola Branch, Academy of Sciences, Apatity, Russia, 3627.
Mining Institute, St. Petersburg, Russia, 1095/1.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 73142, 73143, 73584, 73975.
Mining Institute, St. Petersburg, Russia, 1095/1.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 73142, 73143, 73584, 73975.
Geological Setting of Type Material:
Pegmatite
Associated Minerals at Type Locality:
Reference:
Sokolova, M.N., Dobrovol'skaya, M.G., Organova, N.I., Dmitrik, A.L. (1970) A sulfide of iron and potassium, the new mineral rasvumite. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 99(6): 712-720.
Synonyms of Rasvumite
Other Language Names for Rasvumite
Common Associates
Associated Minerals Based on Photo Data:
| 3 photos of Rasvumite associated with Aegirine | NaFe3+Si2O6 |
| 3 photos of Rasvumite associated with Natrolite | Na2Al2Si3O10 · 2H2O |
| 2 photos of Rasvumite associated with Vaterite | CaCO3 |
| 1 photo of Rasvumite associated with Lamprophyllite | (Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2 |
| 1 photo of Rasvumite associated with Aegirine-augite | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 |
| 1 photo of Rasvumite associated with Erdite | NaFeS2 · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 2.FB.05 | Caswellsilverite | NaCrS2 |
| 2.FB.05 | Schöllhornite | Na0.3CrS2 · H2O |
| 2.FB.05 | Cronusite | Ca0.2CrS2 · 2 H2O |
| 2.FB.10 | Chvilevaite | Na(Cu,Fe,Zn)2S4 |
| 2.FB.15 | Orickite | 2CuFeS2 · H2O |
| 2.FB.20 | Pautovite | CsFe2S3 |
| 2.FB.25 | Colimaite | K3VS4 |
Other Information
Magnetism:
Ferromagnetic
Notes:
Slightly magnetic.
Polishes poorly, easily splitting into fine needles.
Polishes poorly, easily splitting into fine needles.
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 Rasvumite
mindat.org URL:
https://www.mindat.org/min-3369.html
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References for Rasvumite
Reference List:
Czamanske, Gerald K., Erd, Richard C., Sokolova, Maja N., Dobrovol'skaya, Maja G., Dmitrieva, Margret T. (1979) New data on rasvumite and djerfisherite. American Mineralogist, 64 (7-8) 776-778
Clark, Joan R., Brown, Gordon E. (1980) Crystal structure of rasvumite, KFe2S3. American Mineralogist, 65 (5-6) 477-482
Mitchell, Roger H., Ross, Kirk C., Potter, Eric G. (2004) Crystal structures of CsFe2S3 and RbFe2S3: synthetic analogs of rasvumite KFe2S3. Journal of Solid State Chemistry, 177. 1867-1872 doi:10.1016/j.jssc.2004.01.007
Localities for Rasvumite
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.
Antarctica | |
| Ling et al. (2015) |
| Coloma et al. (2023) | |
Canada | |
| Chen et al. (2013) |
| Horváth et al. (1990) +1 other reference |
Jordan | |
| Sokol +9 other references |
Norway | |
| Jamtveit et al. (1997) |
Russia | |
| Sokol et al. (2019) +1 other reference |
| N. V. Sorokhtina et al. (2010) +1 other reference |
| Potter et al. (2017) |
| [World of Stones 95:5-6 +2 other references |
| ZRMO 138 (2) | |
| Sokolova et al. (1970) +2 other references |
| Pekov (1998) | |
| Am Min 79:1011 +2 other references | |
| Sokolova et al. (1970) +2 other references |
| Sokolova et al (2005) +1 other reference | |
| [Mandarino +1 other reference |
| Pekov (1998) +1 other reference | |
| Pavel.M. Kartashov (n.d.) |
| Henderson et al. (1999) | |
| Pekov (2000) +1 other reference |
| Sharygin et al. (2007, August) +1 other reference |
South Africa | |
| Clarke et al. (1977) |
Tanzania | |
| Jago et al. (1999) |
USA | |
| Van Nostrand Reinholt Press: 67 +7 other references |
| 4th Annual New Mexico Mineral Symposium (1985) |
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Kirovskii apatite mine, Kukisvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia