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Fetiasite

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Formula:
(Fe3+,Fe2+,Ti)3(As2O5)O2
Colour:
Brown to black
Hardness:
5
Crystal System:
Monoclinic
Name:
The name reflects its chemical composition: Iron (Fe), Titanium (Ti) and Arsenic (As)
This page provides mineralogical data about Fetiasite.


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Classification of FetiasiteHide

Approved
4.JB.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O
45.1.13.1

45 : ACID AND NORMAL ANTIMONITES AND ARSENITES
1 : Miscellaneous

Physical Properties of FetiasiteHide

Colour:
Brown to black
Streak:
Light brown to ochre
Hardness:

Chemical Properties of FetiasiteHide

Formula:
(Fe3+,Fe2+,Ti)3(As2O5)O2
IMA Formula:
(Fe2+,Fe3+,Ti4+)3O2As3+2O5
Common Impurities:
Mn

Crystallography of FetiasiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 10.61 Å, b = 3.25 Å, c = 8.94 Å
β = 108.95°
Ratio:
a:b:c = 3.265 : 1 : 2.751
Unit Cell V:
291.57 ų (Calculated from Unit Cell)

Type Occurrence of FetiasiteHide

Synonyms of FetiasiteHide

Other Language Names for FetiasiteHide

German:Fetiasit
Spanish:Fetiasita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Graeserite3 photos of Fetiasite associated with Graeserite on mindat.org.
Hematite2 photos of Fetiasite associated with Hematite on mindat.org.
Adularia1 photo of Fetiasite associated with Adularia on mindat.org.
Chamosite1 photo of Fetiasite associated with Chamosite on mindat.org.
Quartz1 photo of Fetiasite associated with Quartz on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.JB.10ManganarsiteMn3(As2O4)(OH)4
4.JB.15MagnussoniteMn10As6O18(OH,Cl)2Iso. m3m (4/m 3 2/m) : Ia3d
4.JB.15UM1984-09-AsO:ClHMnMn10As6O18(OH)ClTet. 4/mmm (4/m 2/m 2/m) : I41/acd
4.JB.20ArmangiteMn2+26(AsO3)14(HAsO3)4(CO3)Trig. 3 : P3
4.JB.25NanlingiteNa(Ca5Li)Mg12(AsO3)2[Fe(AsO3)6]F14Trig.
4.JB.30AsbecasiteCa3(Ti,Sn4+)Be2(AsO3)6(SiO4)2Trig. 3m : P3c1
4.JB.35StenhuggariteCaFeSb(AsO3)2OTet.
4.JB.40TrigonitePb3Mn2+(AsO3)2(HAsO3)Mon. m
4.JB.45FinnemanitePb5(AsO3)3ClHex. 6/m : P63/m
4.JB.50GebharditePb8(As2O5)2OCl6Mon.
4.JB.55DerbyliteFe3+4Ti3Sb3+O13(OH)Mon. 2/m : P21/m
4.JB.55Tomichite(V,Fe)4Ti3AsO13(OH)Mon.
4.JB.55Graeserite(Fe3+ ,Ti)4Ti3AsO13(OH)Mon.
4.JB.60Hemloite(Ti,V3+,Fe3+,Al)12(As3+,Sb3+)2O23(OH)Tric. 1 : P1
4.JB.65FreediteCu+Pb8(AsO3)2O3Cl5Mon. 2/m : B2/m
4.JB.70GeorgiadèsitePb4(AsO3)Cl4(OH)Mon.
4.JB.75Ekatite(Fe3+,Fe2+,Zn)12(AsO3)6(AsO3,HSiO4)2(OH)6Hex.

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 FetiasiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist: 79: 996-1002.
New Minerals (1997), New Minerals 1990-1994.

Internet Links for FetiasiteHide

Localities for FetiasiteHide

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
    • Kennedy Co.
      • Condobolin district
        • Mineral Hill field
McKinnon, A., 2013 Recent Developments at the Mineral Hill mine, NSW. Abstracts, 36th Annual Seminar, Mineralogical Societies of Australasia. Sydney. p. 21-23.
Italy (TL)
 
  • Piedmont
    • Verbano-Cusio-Ossola Province
      • Ossola Valley
        • Antigorio Valley
          • Devero Valley
            • Baceno
              • Devero Alp
American Mineralogist, Volume 79, pages 996-1002, 1994
Switzerland
 
  • Wallis (Valais)
    • Binn Valley
      • Kriegalp Valley (Chriegalp Valley)
No reference listed
      • Lercheltini area (Lärcheltini)
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 164-165.; American Mineralogist, Volume 79, pages 996-1002, 1994
Mineral and/or Locality  
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