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Rasvumite

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Formula:
KFe
 
2
S
 
3
System:OrthorhombicColour:Steel-gray,
Hardness:4 - 5
Name:Named after the type locality: Rasvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia.


Partially alters to orange-brown FexSy in open air, within days or hours.

Classification of Rasvumite

IMA status:Approved
Strunz 8th edition ID:2/F.07-10
Nickel-Strunz 10th (pending) edition ID: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.)
Dana 8th edition ID:2.9.11.1

2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
Hey's CIM Ref.: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
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Type Occurrence of Rasvumite

Co-type Localities:Kirovskii apatite mine (Kirovsky Mine; Kirovskii Mine; Kirov Mine), Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Apatitovyi Tsirk (Apatite Circus), Rasvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Year of Discovery:1970

Physical Properties of Rasvumite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Steel-gray,
Comment:turns iridescent purple or bronze, to dull on oxidation
Hardness (Mohs):4 - 5
Cleavage:Perfect
perfect on {110}
Density (measured):3.1 g/cm3
Density (calculated):3.029 g/cm3

Crystallography of Rasvumite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Cmcm
Space Group Setting:Cmcm
Cell Parameters:a = 9.04Å, b = 11.01Å, c = 5.43Å
Ratio:a:b:c = 0.821 : 1 : 0.493
Unit Cell Volume:V 540.45 ų (Calculated from Unit Cell)

Chemical Properties of Rasvumite

Formula:
KFe
 
2
S
 
3
Simplified for copy/paste:KFe2S3
Essential elements:Fe, K, S
All elements listed in formula:Fe, K, S
Common Impurities:Na,Mg,Ca,Cu

Relationship of Rasvumite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.FB.05Caswellsilverite
NaCrS
 
2
2.FB.05Schöllhornite
Na
 
0.3
CrS
 
2
· H
 
2
O
2.FB.05Cronusite
Ca
 
0.2
CrS
 
2
· 2 H
 
2
O
2.FB.10Chvilevaite
Na(Cu,Fe,Zn)
 
2
S
 
4
2.FB.15Orickite
2CuFeS
 
2
· H
 
2
O
2.FB.20Pautovite
CsFe
 
2
S
 
3
2.FB.25Colimaite
K
 
3
VS
 
4
Related Minerals - Hey's Index Grouping:

- +
3.0.1Erdite
NaFeS
 
2
· 2H
 
2
O
3.0.2Coyoteite
NaFe
 
3
S
 
5
· 2H
 
2
O
3.0.3Chvilevaite
Na(Cu,Fe,Zn)
 
2
S
 
4
3.0.5Bartonite
K
 
6
Fe
 
20
S
 
26
S
3.0.6Murunskite
K
 
2
(Cu,Fe)
 
4
S
 
4

Other Names for Rasvumite

Synonyms:
IMA1970-028
Other Languages:
German:Rasvumit
Russian:Расвумит
Simplified Chinese:硫铁钾矿
Spanish:Rasvumita
Traditional Chinese:硫鐵鉀礦

Other Information

Magnetism:Ferromagnetic
Other Information:Slightly magnetic
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Rasvumite

Reference List:

- +
American Mineralogist (1971): 56: 1121.

Czamanske, G.K., R.C. Erd, M.N. Sokolova, M.G. Dobovol’skaya & M.T. Dmitrieva (1979), New data on rasvumite and djerfisherite: American Mineralogist: 64: 776-778.

American Mineralogist (1980): 65: 477-482.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 99: 712-720.

Internet Links for Rasvumite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Rasvumite details from Handbook of Mineralogy (PDF)
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  • Localities for Rasvumite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Québec
      • Montérégie
        • La Vallée-du-Richelieu RCM
          • Mont Saint-Hilaire
    Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359. CHAKHMOURADIAN, A.R., HALDEN, N.M., MITCHELL, R.H., and HORVÁTH, L. (2007) Rb-Cs-rich rasvumite and sector-Zoned “loparite-(Ce)” from the Mont Saint-Hilaire (Québec, Canada) and their petrologic significance. European Journal of Mineralogy, 19, 533-546.
    Norway
     
    • Telemark
      • Skien
    Jamtveit B., Dahlgren S. and Austrheim H. (1997): High-grade contact metamorphism of calcareous rocks from the Oslo Rift, Southern Norway. American Mineralogist. 82 : 1241 - 1254
    Russia
     
    • Eastern-Siberian Region
      • Krasnoyarsk Territory (Krasnoyarsk Kray; Krasnoyarskii Krai)
        • Maimecha and Kotui Rivers Basin
    N. V. Sorokhtina, A.M. Asavin, V.G .Senin (2010) K-bearing sulfides in carbonatites of the Guli massif of the Polar Siberia. Abstracts of XXVII International conference School «Geochemistry of Alkaline rocks». – Moscow-Koktebel’. pp. 240 pp.
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
            • Koashva Mt
    [World of Stones 95:5-6, p64]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Kapustin, Y. L., Pudovkina, Z. V., Bykova, A. V., & Lyubomilova, G. V. (1975). Koashvite, a new mineral. International Geology Review, 17(6), 654-660.
    ZRMO 138(2),52-66(2009)
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    [Mandarino, 1997]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Am Min 79:1011; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Sokolova et al (2005) New Data on Minerals Vol 40 pp115-118
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
            • Yukspor Mt
    Pavel M. Kartashov data
    Henderson, C. M. B., Kogarko, L. N., & Plant, D. A. (1999). Extreme closed system fractionation of volatile-rich, ultrabasic peralkaline melt inclusions and the occurrence of djerfisherite in the Kugda alkaline complex, Siberia. Mineralogical Magazine, 63(3), 433-438.
    Pekov, I.V. (2000): Lovozero Massif. Moscow, Ocean Pictures Ltd, 480 pp.
    USA
     
    • California
      • Humboldt Co.
        • Coastal Range
    Czamanske, G.K., M.A. Lamphere, R.C. Erd & M.C. Blake (1978) Age measurement of potassium-bearing sulfide minerals by the 40Ar/39Ar technique: Earth Planet. Sci. Lett.: 40: 107-110; Czamanske, G.K., R.C. Erd, M.N. Sokolova, M.G. Dobovol’skaya & M.T. Dmitrieva (1979), New data on rasvumite and djerfisherite: American Mineralogist: 64: 776-778; Czamanske, G.K., B.F. Leonard & J.R. Clark (1980), Erdite, a new hydrated sodium iron sulfide mineral: American Mineralogist: 65: 509-515; Konnert, J.A. and Evans, H.T. (1980) The crystal structure of erdite, NaFeS2 •2H2O. American Mineralogist: 65: 516-521; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 67; American Mineralogist: (1983) 68: 245-254; www.koeln.netsurf.de/~w.steffens/usa.htm.
    • New Mexico
      • Colfax Co.
        • Springer
          • Point of Rocks Mesa (Pecks Mesa)
    4th Annual New Mexico Mineral Symposium (1985) New Mexico Geology 7:18-19
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