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Clinoferrosilite

Big Photo

Merensky Reef, Western Bushveld Complex, Northwest Province, South Africa
© 2007, JGW

Formula:
Fe
2+
 
(Fe
2+
 
,Mg)[Si
 
2
O
 
6
]
System:MonoclinicColour:brown, colourless, green
Hardness:5 - 6


Pyroxene Group - Clinopyroxene Subgroup

Classification of Clinoferrosilite

IMA status:Approved
Strunz 8th edition ID:8/F.01-20
Nickel-Strunz 10th (pending) edition ID:9.DA.10

9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
Dana 8th edition ID:65.1.1.2

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2
Hey's CIM Ref.:14.21.4

14 : Silicates not Containing Aluminum
21 : Silicates of Fe and Mg
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Type Occurrence of Clinoferrosilite

Type Locality:Obsidian Cliff, Yellowstone National Park, Park Co., Wyoming, USA
Year of Discovery:1935

Physical Properties of Clinoferrosilite

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

Crystallography of Clinoferrosilite

Crystal System:Monoclinic
Cell Parameters:a = 9.53Å, b = 9.21Å, c = 5.15Å
β = 107.63°
Ratio:a:b:c = 1.035 : 1 : 0.559
Unit Cell Volume:V 430.79 ų (Calculated from Unit Cell)

Optical Data of Clinoferrosilite

Type:Biaxial (+)
RI values: nα = 1.764 nβ = 1.767 nγ = 1.792
2V:Measured: 25° , Calculated: 40°
Maximum Birefringence:δ = 0.028

Chart 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 Clinoferrosilite

Formula:
Fe
2+
 
(Fe
2+
 
,Mg)[Si
 
2
O
 
6
]
Essential elements:Fe, O, Si
All elements listed in formula:Fe, Mg, O, Si

Relationship of Clinoferrosilite to other Species

Member of Group:
Clinopyroxene Subgroup:
Related Minerals - Nickel-Strunz Grouping):

- +
9.DA.05Donpeacorite
(Mn
2+
 
,Mg)Mg[SiO
 
3
]
 
2
9.DA.05Enstatite
Mg
 
2
[SiO
 
3
]
 
2
9.DA.05Ferrosilite
Fe
 
2
[SiO
 
3
]
 
2
9.DA.10Clinoenstatite
Mg
 
2
[Si
 
2
O
 
6
]
9.DA.10Kanoite
Mn
2+
 
(Mg,Mn
2+
 
)[Si
 
2
O
 
6
]
9.DA.10Pigeonite
(Mg,Fe
2+
 
,Ca)(Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.15Augite
(Ca,Na)(Mg,Fe
2+
 
,Al,Fe
3+
 
,Ti)[(Si,Al)
 
2
O
 
6
]
9.DA.15Diopside
CaMg[Si
 
2
O
 
6
]
9.DA.15Esseneite
CaFe
3+
 
[AlSiO
 
6
]
9.DA.15Hedenbergite
CaFe
2+
 
[Si
 
2
O
 
6
]
9.DA.15Johannsenite
CaMn
2+
 
[Si
 
2
O
 
6
]
9.DA.15Petedunnite
Ca(Zn,Mn
2+
 
,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.15Davisite
CaScAlSiO
 
6
9.DA.15Kushiroite
CaAl[AlSiO
 
6
]
9.DA.15Grossmanite
CaTi
3+
 
 AlSiO
 
6
9.DA.20Aegirine-augite
(Na,Ca)(Fe
3+
 
,Fe
2+
 
,Mg,Al)Si
 
2
O
 
6
9.DA.20Omphacite
(Ca,Na)(Mg,Al)[Si
 
2
O
 
6
]
9.DA.25Aegirine
NaFe
3+
 
[Si
 
2
O
 
6
]
9.DA.25Jadeite
Na(Al,Fe
3+
 
)[Si
 
2
O
 
6
]
9.DA.25Jervisite
(Na,Ca,Fe
2+
 
)(Sc,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.25Kosmochlor
NaCr[Si
 
2
O
 
6
]
9.DA.25Namansilite
NaMn
3+
 
[Si
 
2
O
 
6
]
9.DA.25Natalyite
Na(V
3+
 
,Cr)[Si
 
2
O
 
6
]
9.DA.30Spodumene
LiAl[Si
 
2
O
 
6
]
Related Minerals - Hey's Index Grouping:

- +
14.21.1Olivine
(Mg,Fe
2+
 
)
 
2
[SiO
 
4
]
14.21.2Ringwoodite
(Mg,Fe
2+
 
)
 
2
[SiO
 
4
]
14.21.3Wadsleyite
(Mg,Fe
2+
 
)
 
2
[SiO
 
4
]
14.21.5Anthophyllite
☐[Mg
 
2
][Mg
 
5
][(OH)
 
2
|Si
 
8
O
 
22
]
14.21.6Cummingtonite
[ ][Mg
 
2
][Mg
 
5
][(OH)
 
2
|Si
 
8
O
 
22
]
14.21.7 Magnesiocummingtonite
14.21.8Grunerite
[ ][Fe
2+
2
][Fe
2+
5
][(OH)
 
2
|Si
 
8
O
 
22
]
14.21.9Minnesotaite
(Fe,Mg)
 
3
Si
 
4
O
 
10
(OH)
 
2
14.21.10Chesterite
(Mg,Fe)
 
17
Si
 
20
O
 
54
(OH)
 
6
14.21.11Jimthompsonite
(Mg,Fe)
 
5
Si
 
6
O
 
16
(OH)
 
2
14.21.12Clinojimthompsonite
(Mg,Fe)
 
5
Si
 
6
O
 
16
(OH)
 
2
14.21.13Majorite
Mg
 
3
(Fe
2+
 
,Si,Al)
 
2
[SiO
 
4
]
 
3
14.21.14Balangeroite
(Mg,Fe,Fe,Mn)
 
42
Si
 
16
O
 
54
(OH)
 
40

Other Names for Clinoferrosilite

Other Languages:
German:Clinoferrosilit
Klinoferrosilit
Russian:Клиноферросилит
Spanish:Clinoferrosilita

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 Clinoferrosilite

Reference List:American Mineralogist (1936): 21: 678.

Clark, J.R., D.E. Appleman, and J.J. Papike (1969) Crystal-chemical characterization of clinopyroxenes based on eight new structure refinements. MSA Special Paper 2: 31-50.

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 Clinoferrosilite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Clinoferrosilite in the Natural History Museum (London) online catalogue
  • Clinoferrosilite details from Handbook of Mineralogy (PDF)
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    Localities for Clinoferrosilite

    Hide Locality List
    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.
    Australia
     
    • New South Wales
      • Yancowinna Co.
    		Birch BH Book
    Brazil
     
    • Southeast Region
      • Minas Gerais
    		Jour. of South American Earth Sci. 15:709–723
    Germany
     
    • Rhineland-Palatinate
      • Eifel Mts
        • Mayen
          • Ettringen
            • Bellerberg volcano
              • Ettringer Bellerberg Mt. (Bellberg Mt.; Bellenberg Mt.; Billenberg Mt.; Boilenberg Mt.)
    		Blass, G., Graf, H.W., Kolitsch, U., Neue Funde aus der Vulkaneifel - ein Rückblick auf die Sammelsaison 2002, Mineralien-Welt 13/5, 2003
    Japan
     
    • Honshu Island
      • Chugoku Region
        • Okayama Prefecture
          • Takahashi
    		Matsueda, H. (1980) Journal of the Mining College, Akita University, Ser. A, Mining Geology, 5, #4, 15-77.; Matsueda, H. (1980) Journal of the Mining College, Akita University, Ser. A, Mining Geology, 5, #4, 15-77.
    Kenya
     
    • Rift Valley Province
    Russia
     
    • Eastern-Siberian Region
      • Saha Republic (Sakha Republic; Yakutia)
    		[World of Stones 12:49]
    South Africa
     
    • Free State Province
      • Vredefort
    		Minerals of South Africa
    USA
     
    • California
      • Inyo Co.
        • Coso District (New Coso District)
          • Coso Hot Springs
    		www.mineralsocal.org/scfm/california/i.htm.
    • Wyoming
      • Park Co.
        • Yellowstone National Park
    		Amer.J.Sci.(1935) ser. 4, 30, 481-494
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. 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. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 8th Oct 2009 14:51:05