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Osumilite

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Wannenköpfe, Ochtendung, Polch, Eifel Mts, Rhineland-Palatinate, Germany
© Fred Kruijen

Show Osumilite Photos (117)



Formula:
(K,Na)(Fe
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
3
(Si,Al)
 
12
O
 
30
System:HexagonalColour:Blue
Hardness:5 - 6
Member of:Osumilite Group


Osumilite Group.

Difficult to distinguish from Osumilite-(Mg).

Classification of Osumilite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/E.22-90
Nickel-Strunz 10th (pending) edition ID:9.CM.05

9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si6O18]12- 6-membered double rings (sechser-Doppelringe)
Dana 8th edition ID:63.2.1a.6

63 : CYCLOSILICATES Condensed Rings
2 : Condensed Rings (Milarite - Osumilite group)
Hey's CIM Ref.:16.24.16

16 : Silicates Containing Aluminum and other Metals
24 : Aluminosilicates of Fe, Mg, Ca and alkalis
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Type Occurrence of Osumilite

Type Locality:Sakkabira, Osumi Peninsula, Kagoshima Prefecture, Kyushu Region, Japan
Year of Discovery:1953

Physical Properties of Osumilite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Blue
Comment:Strongly pleochroic
Hardness (Mohs):5 - 6

Crystallography of Osumilite

Crystal System:Hexagonal
Cell Parameters:a = 10.15Å, c = 14.25Å
Ratio:a:c = 1 : 1.404
Unit Cell Volume:V 1,271.39 ų (Calculated from Unit Cell)

Chemical Properties of Osumilite

Formula:
(K,Na)(Fe
2+
 
,Mg)
 
2
(Al,Fe
3+
 
)
 
3
(Si,Al)
 
12
O
 
30
Essential elements:Al, Fe, H, K, O, Si
All elements listed in formula:Al, Fe, K, Mg, Na, O, Si
Common Impurities:Ti,Mn,Ba,K

Relationship of Osumilite to other Species

Member of:Osumilite Group
Other Members of Group:

- +
Almarudite
K(□,Na)
 
2
(Mn
2+
 
,Fe
2+
 
,Mg)
 
2
(Be,Al)
 
3
[Si
 
12
O
 
30
]
Armenite
BaCa
 
2
Al
 
6
Si
 
9
O
 
30
 · 2H
 
2
O
Berezanskite
K□
 
2
Li
 
3
(Ti,Zr,Sn)
 
2
[Si
 
12
O
 
30
]
Brannockite
(K,Na)□
 
2
Li
 
3
(Sn,Zr,Ti)
 
2
[Si
 
12
O
 
30
]
Darapiosite
KNa
 
2
(Zn,Li)
 
3
(Mn,Zr)
 
2
[Si
 
12
O
 
30
]
Dusmatovite
K(Na,□)
 
2
(Zn,Li)
 
3
(Mn
2+
 
,Y,Zr)
 
2
[Si
 
12
O
 
30
]
Friedrichbeckeite
K(□
 
0.5
Na
 
0.5
)
 
2
Mg
 
2
Be
 
3
Si
 
12
O
 
30
Klöchite
(□Na)KFe
 
3
Zn
 
3
[Si
 
12
O
 
30
]
Merrihueite
(K,Na)
 
2
(Fe,Mg)
 
5
Si
 
12
O
 
30
Milarite
K
 
2
Ca
 
4
Al
 
2
Be
 
4
Si
 
24
O
 
60
 · H
 
2
O
Osumilite-(Mg)
(K,Na)(Mg,Fe)
 
2
(Al,Fe)
 
3
(Si,Al)
 
12
O
 
30
 · H
 
2
O
Roedderite
(Na,K)
 
2
(Mg,Fe)
 
5
Si
 
12
O
 
30
Shibkovite
K(□,K,Na)
 
2
Zn
 
3
Ca
 
2
[Si
 
12
O
 
30
]
Sogdianite
K(□,Na)
 
2
Li
 
3
(Zr,Fe,Ti)
 
2
[Si
 
12
O
 
30
]
Sugilite
K(Na,□)
 
2
Li
 
3
(Fe,Mn,Al,Zr)
 
2
[Si
 
12
O
 
30
]
Trattnerite
(□,K)(Mg, Fe
2+
 
)
 
3
Fe
3+
2
[Si
 
12
O
 
30
]
Yagiite
(Na,K)
 
3
Mg
 
4
(Al,Mg)
 
6
(Si,Al)
 
24
O
 
60
Related Minerals - Nickel-Strunz Grouping):

- +
9.CM.05Armenite
BaCa
 
2
Al
 
6
Si
 
9
O
 
30
 · 2H
 
2
O
9.CM.05Brannockite
(K,Na)□
 
2
Li
 
3
(Sn,Zr,Ti)
 
2
[Si
 
12
O
 
30
]
9.CM.05Chayesite
K(Mg,Fe)
 
4
FeSi
 
12
O
 
30
9.CM.05Darapiosite
KNa
 
2
(Zn,Li)
 
3
(Mn,Zr)
 
2
[Si
 
12
O
 
30
]
9.CM.05Eifelite
KNa
 
3
Mg
 
4
Si
 
12
O
 
30
9.CM.05Merrihueite
(K,Na)
 
2
(Fe,Mg)
 
5
Si
 
12
O
 
30
9.CM.05Milarite
K
 
2
Ca
 
4
Al
 
2
Be
 
4
Si
 
24
O
 
60
 · H
 
2
O
9.CM.05Osumilite-(Mg)
(K,Na)(Mg,Fe)
 
2
(Al,Fe)
 
3
(Si,Al)
 
12
O
 
30
 · H
 
2
O
9.CM.05Poudretteite
KNa
 
2
B
 
3
Si
 
12
O
 
30
9.CM.05Roedderite
(Na,K)
 
2
(Mg,Fe)
 
5
Si
 
12
O
 
30
9.CM.05Sogdianite
K(□,Na)
 
2
Li
 
3
(Zr,Fe,Ti)
 
2
[Si
 
12
O
 
30
]
9.CM.05Sugilite
K(Na,□)
 
2
Li
 
3
(Fe,Mn,Al,Zr)
 
2
[Si
 
12
O
 
30
]
9.CM.05Yagiite
(Na,K)
 
3
Mg
 
4
(Al,Mg)
 
6
(Si,Al)
 
24
O
 
60
9.CM.05Berezanskite
K□
 
2
Li
 
3
(Ti,Zr,Sn)
 
2
[Si
 
12
O
 
30
]
9.CM.05Dusmatovite
K(Na,□)
 
2
(Zn,Li)
 
3
(Mn
2+
 
,Y,Zr)
 
2
[Si
 
12
O
 
30
]
9.CM.05Shibkovite
K(□,K,Na)
 
2
Zn
 
3
Ca
 
2
[Si
 
12
O
 
30
]
9.CM.05Almarudite
K(□,Na)
 
2
(Mn
2+
 
,Fe
2+
 
,Mg)
 
2
(Be,Al)
 
3
[Si
 
12
O
 
30
]
9.CM.05Trattnerite
(□,K)(Mg, Fe
2+
 
)
 
3
Fe
3+
2
[Si
 
12
O
 
30
]
9.CM.05Oftedalite
(Sc,Ca,Mn
2+
 
)
 
2
K[(Be,Al)
 
3
Si
 
12
O
 
30
]
9.CM.10Faizievite
K
 
2
Na(Ca
 
6
Na)Ti
 
4
Li
 
6
[F
 
2
|Si
 
24
O
 
66
]
Related Minerals - Hey's Index Grouping:

- +
16.24.1Aegirine-augite
(Na,Ca)(Fe
3+
 
,Fe
2+
 
,Mg,Al)Si
 
2
O
 
6
16.24.2Omphacite
(Ca,Na)(Mg,Al)Si
 
2
O
 
6
16.24.4Magnesioferrikatophorite
[Na][CaNa][Mg
 
4
(Fe
3+
 
,Al)][(OH)
 
2
|AlSi
 
7
O
 
22
]
16.24.5Ferrikatophorite
NaCaNaFe
2+
4
(Fe
3+
 
,Al)AlSi
 
7
O
 
22
(OH)
 
2
16.24.6Barroisite
☐{CaNa}{Mg
 
3
AlFe
3+
 
}(AlSi
 
7
O
 
22
)(OH)
 
2
16.24.7Ferribarroisite
☐[CaNa][Mg
 
3
Fe
3+
2
][(OH)
 
2
|AlSi
 
7
O
 
22
]
16.24.8Alumino-ferrobarroisite
☐{CaNa}{Fe
2+
3
Al
 
2
}(AlSi
 
7
O
 
22
)(OH)
 
2
16.24.9Ferrobarroisite
☐{CaNa}{Fe
2+
3
AlFe
3+
 
}(AlSi
 
7
O
 
22
)(OH)
 
2
16.24.10Ferri-ferrobarroisite
☐[CaNa][Fe
2+
3
Fe
3+
2
][(OH)
 
2
|AlSi
 
7
O
 
22
]
16.24.11Hastingsite
{Na}{Ca
 
2
}{Fe
2+
4
Fe
3+
 
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.24.12Magnesiohastingsite
{Na}{Ca
 
2
}{Mg
 
4
Fe
3+
 
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.24.13Taramite
{Na}{CaNa}{Fe
2+
3
AlFe
3+
 
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.24.14Ferri-magnesiotaramite
Na[CaNa][Mg
 
3
Fe
3+
2
][(OH)
 
2
|Al
 
2
Si
 
6
O
 
22
]
16.24.15Magnesiotaramite
{Na}{CaNa}{Mg
 
3
AlFe
3+
 
}(Al
 
2
Si
 
6
O
 
22
)(OH)
 
2
16.24.16Osumilite-(Mg)
(K,Na)(Mg,Fe)
 
2
(Al,Fe)
 
3
(Si,Al)
 
12
O
 
30
 · H
 
2
O

Other Names for Osumilite

Synonyms:
Osumilite-(Fe)
Other Languages:
German:Osumilit
Osumilith
Japanese:大隅石
Russian:Осумилит
Spanish:Osumilita

Other Information

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 Osumilite

Reference List:

- +
American Mineralogist (1956): 41: 104-116.

Canadian Mineralogist (1988): 73: 585-594.

Nowicki, T.E., Frimmel, H.E., and Waters, D.J. (1995) The occurrence of osumilite in pelitic granulites of the Namaqualand metamorphic complex, South Africa. South Africa Journal of Geology: 98: 191-201.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1997): 126(4): 43-53.

Armbruster, Th., Oberhänsli, R. (1988): Crystal chemistry of double-ring silicates: Structural, chemical, and optical variation in osumilites, American Mineralogist, 73, 585-594.

Internet Links for Osumilite

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    • Localities for Osumilite

    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.
    Hide Locality List
    (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.
    Antarctica
     
    • Eastern Antarctica
      • Enderby Land
        • Napier Complex
          • Amundsen Bay
    		Polar Geoscience 14:1-24
        • Tula Mts
          • Mt. Riiser-Larsen
    		Y. Motoyoshi and B.J. Hensen, Eur. J. Mineral., 1989, 1, pp. 467-471.
    Austria
     
    • Burgenland
      • Oberpullendorf
        • Kobersdorf
          • Pauliberg Mt.
    		U. Kolitsch, W. Postl, H.-P. Bojar and W. Trattner (2009): Die Mineralvorkommen im Basalt des Pauliberges. In: Autorenkollektiv (Red. M. A. Götzinger und P. Huber) (2009): Die Mineralien des Burgenlandes - Geologie, Mineralogie und mineralische Rohstoffe. – Wissenschaftliche Arbeiten aus dem Burgenland, Band 126, Amt der Burgenländischen Landesregierung, Abteilung 7 - Landesmuseum, Eisenstadt, 83-99.
    Canada
     
    • Newfoundland and Labrador
    		Journal of Petrology 32:29-61 (1991)
        • Nain Complex
    		AmMin. 61:29-37
    France
     
    • Auvergne
      • Haute-Loire
        • Le Puy-en-Velay
          • Espaly-Saint-Marcel
    		D. BARRIER, G. POURTIER & P. MEDARD, 2004, Minéralogie du Mont Denise (Haute-Loire), Le Cahier des Micromonteurs, 83, pp 3-8
    Germany
     
    • Bavaria
      • Franconia
        • Fichtelgebirge
          • Kemnath
    		Weiss: "Mineralfundstellen, Deutschland West", 1990
    • Hesse
      • Eschwege
    		S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
    • Rhineland-Palatinate
      • Eifel Mts
        • Mayen
          • Ettringen
            • Bellerberg volcano
    		[Schreyer, W., Hentschel, G., Abraham, K., Osumilith in der Eifel und die Verwendung dieses Minerals als petrogenetischer Indikator , Tscherm. Mineral.- Petrogr. Mitt. 31, 215-234, 1983] [Lapis, 15 (5), 9-36]
    Hungary
     
    • Szabolcs-Szatmár-Bereg Co.
      • Tarpa
    		Koch: Minerals of Hungary, 1985
    India
     
    • Andhra Pradesh
      • Visakhapatnam District
    		Eur. J. Mineral. , 1991, 3, pp. 367-386.
    Italy
     
    • Campania
      • Naples Province
        • Somma-Vesuvius Complex
          • Mt. Vesuvius
    		Balassone, G., Franco, E., Mattia, C.A., Puliti, R. (2004): Indialite in xenolithic rocks from Somma-Vesuvius volcano (Southern Italy): crystal chemistry and petrogenetic features, American Mineralogist 89: 1-6
    • Sardinia
      • Oristano Province
        • Mt. Arci
          • Marrubiu
    		De Michele, V. (1974). Guida mineralogica d'Italia. Istituto Geografico De Agostini, Novara, 2 vol
    Japan
     
    • Kyushu Region
      • Kagoshima Prefecture
        • Kagoshima City
    		(mistaken locality attribution occasionally seen on labels because osumilite's type locality is nearby, but not on Sakurajima)
        • Kirishima City
        • Osumi Peninsula
    		Proc.Japan Acad.(1953) 29, 321-323
    New Zealand
     
    • North Island
      • Bay of Plenty
        • Rotorua
          • Mt. Ngongotaha
    		Martin Stolworthy Collection
      • Taupo
        • Atiamuri
    		Personal collection of Rod Martin
    Norway
     
    • Rogaland
      • Bjerkreim
        • Vikeså
    		Maijer, C.; Jansen, J.B.H.; Wevers, J. & Poorter, R. P. E. (1977): Contribution to the mineralogy of Norway, no 63. Osumilite, a new mineral to Norway. Norsk Geologisk Tidsskrift 57 (2), 187-188
      • Lund
        • Flatestøl
    		Waters, D. J. (1991): Hercynite-quartz granulites; phase relations, and implications for crustal processes. European Journal of Mineralogy 3: 367-386
    Russia
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha Republic; Yakutia)
    		[World of Stones 12:49]
    • Urals Region
      • Southern Urals
        • Chelyabinsk Oblast'
    		Cesnokov, B., Kotrly, M. and Nisanbajev, T. (1998): Brennende Abraumhalden und Aufschlüsse im Tscheljabinsker Kohlenbecken - eine reiche Mineralienküche. Mineralien-Welt, 9 (3), 54-63 (in German).
    South Africa
     
    • Northern Cape Province
    Tajikistan
     
    • Region of Republican Subordination
      • Tien Shan Mts
        • Alai (Alayskiy) Range
    		[Lapis 1991:12 p.42-48]
    Uganda
     
    • Kotido District (Karamoja District)
    		Eur. J. Mineral. , 1991, 3, pp. 367-386.
    USA
     
    • Oregon
      • Lane Co.
        • McKenzie Pass
          • North Sister Mountain
    		Olsen E., Bunch T.E. (Am. Min. 55, 875-879, 1970)
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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