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Ferro-anthophyllite

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Formula:
☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
The anthophyllite group are orthorhombic amphiboles in the magnesium-iron-manganese amphibole subgroup. The minerals in this root name group may have either Pnma or Pnmn (proto- prefixed name) space group symmetry. The anthophyllite group's composition is defined with A(Na+K+2Ca)<0.5 apfu and C(Al+Fe3++2Ti)<1 apfu.

Ferro-anthophyllite has a standard Pnma space group symmetry and is defined with Fe as the dominant element both in the B and C positions.
Colour:
Clove-brown to dark brown, grey to white, pale green.
Lustre:
Vitreous
Hardness:
5½ - 6
Crystal System:
Orthorhombic
Name:
For its relationship to anthophyllite
This page provides mineralogical data about Ferro-anthophyllite.


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Classification of Ferro-anthophylliteHide

Approved, 'Grandfathered' (first described prior to 1959)
9.DD.05

9 : SILICATES (Germanates)
D : Inosilicates
D : Inosilicates with 2-periodic double chains, Si4O11; Orthoamphiboles
14.19.4

14 : Silicates not Containing Aluminum
19 : Silicates of Fe

Physical Properties of Ferro-anthophylliteHide

Vitreous
Colour:
Clove-brown to dark brown, grey to white, pale green.
Streak:
White to greyish-white.
Hardness:
5½ - 6 on Mohs scale

Chemical Properties of Ferro-anthophylliteHide

Formula:
☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2

The anthophyllite group are orthorhombic amphiboles in the magnesium-iron-manganese amphibole subgroup. The minerals in this root name group may have either Pnma or Pnmn (proto- prefixed name) space group symmetry. The anthophyllite group's composition is defined with A(Na+K+2Ca)<0.5 apfu and C(Al+Fe3++2Ti)<1 apfu.

Ferro-anthophyllite has a standard Pnma space group symmetry and is defined with Fe as the dominant element both in the B and C positions.
IMA Formula:
◻Fe2+2Fe2+5Si8O22(OH)2

Crystallography of Ferro-anthophylliteHide

Crystal System:
Orthorhombic

Type Occurrence of Ferro-anthophylliteHide

Synonyms of Ferro-anthophylliteHide

Other Language Names for Ferro-anthophylliteHide

Varieties of Ferro-anthophylliteHide

Aluminian FerroanthophylliteA discontinued amphibole name.

Relationship of Ferro-anthophyllite to other SpeciesHide

Other Members of this group:
Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2Orth. mmm (2/m 2/m 2/m) : Pnma
Proto-anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2Orth. mmm (2/m 2/m 2/m) : Pnnm
Proto-ferro-anthophyllite☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2Orth.
Forms a series with:

Related Minerals - Nickel-Strunz GroupingHide

9.DD.05Ferro-gedrite☐{Fe2+2}{Fe2+3Al2}(Al2Si6O22)(OH)2Orth.
9.DD.05Gedrite☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2Orth.
9.DD.05Holmquistite☐{Li2}{Mg3Al2}(Si8O22)(OH)2Orth.
9.DD.05Proto-ferro-suenoite☐{Mn2+2}{Fe2+5}(Si8O22)(OH)2Orth.
9.DD.05Sodicanthophyllite{Na}{Mg2}{Mg5}(AlSi7O22)(OH)2Orth.
9.DD.05Sodic-ferro-anthophyllite{Na}{Fe2+2}{Fe2+5}(AlSi7O22)(OH)2Orth.
9.DD.05Sodic-ferrogedrite{Na}{Fe2+2}{Fe2+3Al2}(Al3Si5O22)(OH)2Orth.
9.DD.05Sodicgedrite{Na}{Mg2}{Mg3Al2}(Al3Si5O22)(OH)2Orth.
9.DD.05Ferro-holmquistite☐{Li2}{Fe2+3Al2}(Si8O22)(OH)2Orth.
9.DD.05Proto-anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2Orth. mmm (2/m 2/m 2/m) : Pnnm

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.19.1FayaliteFe2+2SiO4Orth.
14.19.2FerrosiliteFeSiO3Orth. mmm (2/m 2/m 2/m) : Pbca
14.19.3LaihuniteFe2+Fe3+2(SiO4)2Mon.
14.19.5FerripyrophylliteFe3+Si2O5(OH)Mon.
14.19.6Greenalite(Fe2+,Fe3+)2-3Si2O5(OH)4Mon.
14.19.7CronstedtiteFe2+2Fe3+((Si,Fe3+)2O5)(OH)4Trig. 3m : P3 1m
14.19.8HisingeriteFe3+2(Si2O5)(OH)4 · 2H2OMon.

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 Ferro-anthophylliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mandarino, J.A. (1998) The Second List of Additions and Corrections to the Glossary of Mineral Species (1995). The Amphibole Group. Mineralogical Record: 29: 169-174.
Hawthorne, F.C., Oberti, R. (2006) On the classification of amphiboles. The Canadian Mineralogist: 44: 1-21.
Hawthorne, F.C., Oberti, R., Harlow, G.E., Maresch, W.V., Martin, R.F., Schumacher, J.C., Welch, M.D. (2012) Nomenclature of the amphibole supergroup. American Mineralogist: 97: 2031-2048.

Internet Links for Ferro-anthophylliteHide

Localities for Ferro-anthophylliteHide

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.
China
 
  • Inner Mongolia Autonomous Region
    • Xilin Gol League (Xilinguole Prefecture)
      • Plain Blue Banner (Zhenglan Co.)
Yiming Zhao, Daxin Li, Wenming Chen, Chengyou Feng, and Wenhong Sun (2006): Mineral Deposits 25(2), 113-122; Yiming Zhao, Daxin Li, Liangshi Wu, Wenming Chen, Chengyou Feng, Peihua Wang, and Xuedong Gao (2008): Mineral Deposits 27(4), 425-448
Czech Republic
 
  • Vysočina Region
    • Žďár nad Sázavou District
      • Křižanov
Staněk, J.: Parageneze minerálů pegmatitových žil z Hatí u Dolních Borů na západní Moravě. Acta Mus. Moraviae, Sci. nat., vol. 76, pages 19-49. Schreyer, W., Bernhardt, H.-J., Medenbach, O.: Ferrogedrite, siderophyllite, septechamosite, andalusite and chloritoid as alteration products of sekaninaite (ferrocordierite) from the Dolní Bory pegmatite, Moravia. Russian Geology and Geophysics, 1993, 34, 12, 125-131.
Romania
 
  • Suceava Co.
    • Suceava district
      • Iacobeni (Jakobeny; Jacobeny; Jakabfalva)
http://minerals-of-the-carpathians.eu
USA (TL)
 
  • Idaho
    • Shoshone Co.
      • Coeur d'Alene District
        • Ninemile Creek
          • Custer Peak
Rocks & Min. 70:262
  • Massachusetts
    • Essex Co.
Gleba, 1978. Massachusetts Mineral & Fossil Localities
www.agu.org/cgi-bin/wais?l=V21B-01; Bozhilov, K. N. & Evans, B. W., 2001. Ferroanthophyllite in Rockport grunerite: A transmission electron microscopy study.(AmMin 86(10):1252-1260.)
Mineral and/or Locality  
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