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Clinoferrosilite

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Formula:
Fe2+SiO3
Colour:
brown, colourless, green
Hardness:
5 - 6
Crystal System:
Monoclinic
Dimorph of:
Isostructural with:
Pyroxene Group - Clinopyroxene Subgroup

Note: in some previous texts the name ferrosilite was used for what is now called clinoferrosilite, whereas the equivalent orthorhombic dimorph was called orthoferrosilite, so be careful when reading older texts.


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Classification of ClinoferrosiliteHide

Clinoferrosilite and its relation to other pyroxenes

Previous petrological nomenclature of clinopyroxenes from basaltic magmas, note described here as 'ferrosilite' (after Poldervaart & Hess, 1951)

Approved, 'Grandfathered' (first described prior to 1959)
9.DA.10

9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
65.1.1.2

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2
14.21.4

14 : Silicates not Containing Aluminum
21 : Silicates of Fe and Mg

Pronounciation of ClinoferrosiliteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of ClinoferrosiliteHide

Colour:
brown, colourless, green
Streak:
white
Hardness:
5 - 6 on Mohs scale
Cleavage:
Distinct/Good

Optical Data of ClinoferrosiliteHide

Type:
Biaxial (+)
RI values:
nα = 1.764 nβ = 1.767 nγ = 1.792
2V:
Measured: 25° , Calculated: 40°
Max Birefringence:
δ = 0.028
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
very strong

Chemical Properties of ClinoferrosiliteHide

Formula:
Fe2+SiO3

Crystallography of ClinoferrosiliteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 9.7085 Å, b = 9.0872 Å, c = 5.2284 Å
β = 108.432°
Ratio:
a:b:c = 1.068 : 1 : 0.575
Unit Cell V:
437.60 ų (Calculated from Unit Cell)
Z:
4
Comment:
Synthetic sample (pure Fe2Si2O6). Mg-bearing sample has 9.53, 9.21, 5.15 Å, 107.63°.

Type Occurrence of ClinoferrosiliteHide

Other Language Names for ClinoferrosiliteHide

Relationship of Clinoferrosilite to other SpeciesHide

Other Members of this group:
AegirineNaFe3+Si2O6Mon. 2/m : B2/b
Aegirine-augite(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6Mon. 2/m : B2/b
Augite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : B2/b
ClinoenstatiteMgSiO3Mon. 2/m : P21/b
DiopsideCaMgSi2O6Mon. 2/m : B2/b
EsseneiteCaFe3+[AlSiO6]Mon. 2/m : B2/b
HedenbergiteCaFe2+Si2O6Mon. 2/m : B2/b
JadeiteNa(Al,Fe3+)Si2O6Mon.
JervisiteNaSc3+Si2O6Mon.
JohannseniteCaMn2+Si2O6Mon. 2/m : B2/b
KanoiteMn2+(Mg,Mn2+)Si2O6Mon. 2/m : P21/b
KosmochlorNaCrSi2O6Mon.
KushiroiteCaAl[AlSiO6]Mon. 2/m : B2/b
NamansiliteNaMn3+Si2O6Mon.
NatalyiteNaV3+Si2O6Mon.
Omphacite(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6Mon. 2/m
PetedunniteCa(Zn,Mn2+,Mg,Fe2+)Si2O6Mon.
Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : P21/b
SpodumeneLiAlSi2O6Mon.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Diopside1 photo of Clinoferrosilite associated with Diopside on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.DA.ProtoenstatiteMg2Si2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
9.DA.05Donpeacorite(Mn2+,Mg)Mg[SiO3]2Orth.
9.DA.05EnstatiteMgSiO3Orth. mmm (2/m 2/m 2/m) : Pbca
9.DA.05FerrosiliteFeSiO3Orth. mmm (2/m 2/m 2/m) : Pbca
9.DA.10ClinoenstatiteMgSiO3Mon. 2/m : P21/b
9.DA.10KanoiteMn2+(Mg,Mn2+)Si2O6Mon. 2/m : P21/b
9.DA.10Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : P21/b
9.DA.15Augite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : B2/b
9.DA.15DiopsideCaMgSi2O6Mon. 2/m : B2/b
9.DA.15EsseneiteCaFe3+[AlSiO6]Mon. 2/m : B2/b
9.DA.15HedenbergiteCaFe2+Si2O6Mon. 2/m : B2/b
9.DA.15JohannseniteCaMn2+Si2O6Mon. 2/m : B2/b
9.DA.15PetedunniteCa(Zn,Mn2+,Mg,Fe2+)Si2O6Mon.
9.DA.15DavisiteCaScAlSiO6Mon. 2/m : B2/b
9.DA.15KushiroiteCaAl[AlSiO6]Mon. 2/m : B2/b
9.DA.15GrossmaniteCaTi3+ AlSiO6Mon. 2/m : B2/b
9.DA.20Aegirine-augite(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6Mon. 2/m : B2/b
9.DA.20Omphacite(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6Mon. 2/m
9.DA.25AegirineNaFe3+Si2O6Mon. 2/m : B2/b
9.DA.25JadeiteNa(Al,Fe3+)Si2O6Mon.
9.DA.25JervisiteNaSc3+Si2O6Mon.
9.DA.25KosmochlorNaCrSi2O6Mon.
9.DA.25NamansiliteNaMn3+Si2O6Mon.
9.DA.25NatalyiteNaV3+Si2O6Mon.
9.DA.30SpodumeneLiAlSi2O6Mon.

Related Minerals - Dana Grouping (8th Ed.)Hide

65.1.1.1ClinoenstatiteMgSiO3Mon. 2/m : P21/b
65.1.1.2EliseeviteLiNa1.5Ti2(H1.5Si4O12)O2 · 2H2OMon. 2/m : B2/b
65.1.1.3KanoiteMn2+(Mg,Mn2+)Si2O6Mon. 2/m : P21/b
65.1.1.4Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.21.1OlivineOrth.
14.21.2Ringwoodite(Mg,Fe2+)2SiO4Iso. m3m (4/m 3 2/m) : Ia3d
14.21.3Wadsleyite(Mg,Fe2+)2(SiO4)Orth.
14.21.5Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2Orth. mmm (2/m 2/m 2/m) : Pnma
14.21.6Cummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2Mon.
14.21.7 Magnesiocummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2
14.21.8Grunerite☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2Mon. 2/m : B2/m
14.21.9MinnesotaiteFe2+3Si4O10(OH)2Tric. 1 : P1
14.21.10Chesterite(Mg,Fe)17Si20O54(OH)6Orth.
14.21.11Jimthompsonite(Mg,Fe)5Si6O16(OH)2Orth. mmm (2/m 2/m 2/m) : Pbca
14.21.12Clinojimthompsonite(Mg,Fe)5Si6O16(OH)2Mon.
14.21.13MajoriteMg3(Fe2+,Si,Al)2(SiO4)3Iso.
14.21.14Balangeroite(Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40Mon.

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for ClinoferrosiliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bowen, N.L. (1935) Ferrosilite as a natural mineral. American Journal of Science: 30: 481-494.
Foshag, W.F. (1936) New mineral names. American Mineralogist: 21: 678.
Poldervaart, A. and Hess, H.H. (1951) Pyroxenes in the Crystallization of Basaltic Magma. The Journal of Geology 59, no. 5 (Sep. 1951): 472-489.
Clark, J.R., Appleman, D.E., and Papike, J.J. (1969) Crystal-chemical characterization of clinopyroxenes based on eight new structure refinements. MSA Special Paper: 2: 31-50.
Sueno, S., Kimata, M., Prewitt, C.T. (1984): The crystal structure of high clinoferrosilite. American Mineralogist, 69, 264-269.
Hugh-Jones, D.A., Sharp, T., Angel, R.J., and Woodland, A. (1996) The transition of orthoferrosilite to high-pressure C2/c clinoferrosilite at ambient temperature. European Journal of Mineralogy: 8: 1337-1345.

Internet Links for ClinoferrosiliteHide

Localities for ClinoferrosiliteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • New South Wales
    • Yancowinna Co.
Birch BH Book
Brazil
 
  • Minas Gerais
Jour. of South American Earth Sci. 15:709–723
China
 
  • Henan Province
    • Pingdingshan Prefecture
      • Lushan Co.
Dongyang Zhang, Huimin Su, Lei Tian, Jianli Kang, and Yang Gao (2010): Journal of Mineralogy and Petrology 31(1), 53-63
Germany
 
  • North Rhine-Westphalia
    • Sauerland
      • Iserlohn
        • Letmathe
BLAß, G. & GRAF, H. W. (1995): Neufunde von bekannten Fundstellen (13). Mineralien-Welt 6 (3), 47-51.
  • Rhineland-Palatinate
    • Eifel
      • Mayen
        • Ettringen
          • Bellerberg volcano
Blass, G., Graf, H.W., Kolitsch, U., Neue Funde aus der Vulkaneifel - ein Rückblick auf die Sammelsaison 2002, Mineralien-Welt 13/5, 2003
India
 
  • Rajasthan (Rajputana)
Bhattacharjee, N., Ray, J., Ganguly, S., & Saha, A. (2012). Mineralogical Study of Gabbro-Anorthosite from Dumka, Chhotanagpur Gneissic Complex, Eastern Indian Shield. Journal of the Geological Society of India, 80(4), 481-492.
Japan
 
  • Honshu Island
    • Chugoku Region
      • Okayama Prefecture
        • Takahashi City
          • Bicchu-cho (Bitchu-cho)
            • Shitouyouze
Matsueda, H. (1980) Journal of the Mining College, Akita University, Ser. A, Mining Geology, 5, #4, 15-77.
Kenya
 
  • Rift Valley Province
Rocky Mountain (53rd) and South-Central (35th) Sections, GSA, Joint Annual Meeting (April 29–May 2, 2001) Session No. 7--Booth# 38
Russia
 
  • Eastern-Siberian Region
    • Sakha Republic (Saha Republic; Yakutia)
[World of Stones 12:49]
South Africa
 
  • Free State Province
    • Fezile Dabi District
      • Vredefort
Cairncross, B. and Dixon, R., (1995) Minerals of South Africa. The Geological Society of South Africa.
  • North West Province
    • Bojanala Platinum District
      • Western Bushveld Complex
Excalibur Minerals photo ID 140072
Tajikistan
 
  • Viloyati Sogd (Viloyati Sughd; Viloyati Khodzhent; Viloyati Leninabad)
    • Zeravshan Range
      • Yagnob River
Sharygin, V.V., Sokol, E.V. and Belakovskii, D.I. (2009): Fayalite-sekaninaite paralava from the Ravat coal fire (central Tajikistan). Russian Geology and Geophysics 50, 703-721.
USA
 
  • California
    • Inyo Co.
      • Coso Mts (Coso Range)
        • Coso District (New Coso District)
          • Coso Hot Springs
www.mineralsocal.org/scfm/california/i.htm.
          • Sugarloaf Mountain
Bowen, N.L. (1935), Ferrosilite as a natural mineral: American Journal of Science, 5th. Series: 30: 481; Bradley, W.W. (1940), Thirty-sixth report of the State Mineralogist: California Division Mines Report 36: 107; Pemberton, H. Earl (1983), Minerals of California: 386.
Bowen, N.L. (1935), Ferrosilite as a natural mineral: American Journal of Science, 5th. Series: 30: 481 (491 ?); Bradley, W.W. (1940), Thirty-sixth report of the State Mineralogist: California Division Mines Report 36: 107; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 307.
  • Wyoming
    • Campbell Co.
      • Reno Junction
Gunnar Färber - Mineralienliste 3-2017.
    • Park Co.
Amer.J.Sci.(1935) ser. 4, 30, 481-494
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