Fetiasite
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About Fetiasite
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.
Classification of Fetiasite
Approved
4/J.06-10
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
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
45 : ACID AND NORMAL ANTIMONITES AND ARSENITES
1 : Miscellaneous
Physical Properties of Fetiasite
Chemical Properties of Fetiasite
Formula:
(Fe3+,Fe2+,Ti)3(As2O5)O2
IMA Formula:
(Fe2+,Fe3+,Ti4+)3O2As3+2O5
Elements listed:
Common Impurities:
Mn
Crystallography of Fetiasite
Crystal System:
Monoclinic
Cell Parameters:
a = 10.61 Å, b = 3.25 Å, c = 8.94 Å
β = 108.95°
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 Fetiasite
Synonyms of Fetiasite
Other Language Names for Fetiasite
Common Associates
Associated Minerals Based on Photo Data:
| 3 photos of Fetiasite associated with Graeserite | (Fe3+,Ti)4Ti3AsO13(OH) |
| 2 photos of Fetiasite associated with Hematite | Fe2O3 |
| 1 photo of Fetiasite associated with Adularia | KAlSi3O8 |
| 1 photo of Fetiasite associated with Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| 1 photo of Fetiasite associated with Quartz | SiO2 |
Related Minerals - Nickel-Strunz Grouping
| 4.JB.10 | Manganarsite | Mn3(As2O4)(OH)4 | Trig. |
| 4.JB.15 | Magnussonite | Mn10As6O18(OH,Cl)2 | Iso. m3m (4/m 3 2/m) : Ia3d |
| 4.JB.15 | UM1984-09-AsO:ClHMn | Mn10As6O18(OH)Cl | Tet. 4/mmm (4/m 2/m 2/m) : I41/acd |
| 4.JB.20 | Armangite | Mn2+26(AsO3)14(HAsO3)4(CO3) | Trig. 3 : P3 |
| 4.JB.25 | Nanlingite | Na(Ca5Li)Mg12(AsO3)2[Fe(AsO3)6]F14 | Trig. |
| 4.JB.30 | Asbecasite | Ca3(Ti,Sn4+)Be2(AsO3)6(SiO4)2 | Trig. 3m : P3c1 |
| 4.JB.35 | Stenhuggarite | CaFeSb(AsO3)2O | Tet. |
| 4.JB.40 | Trigonite | Pb3Mn2+(AsO3)2(HAsO3) | Mon. m |
| 4.JB.45 | Finnemanite | Pb5(AsO3)3Cl | Hex. 6/m : P63/m |
| 4.JB.50 | Gebhardite | Pb8(As2O5)2OCl6 | Mon. 2/m : P21/b |
| 4.JB.55 | Derbylite | Fe3+4Ti3Sb3+O13(OH) | Mon. 2/m : P21/m |
| 4.JB.55 | Tomichite | (V,Fe)4Ti3AsO13(OH) | Mon. |
| 4.JB.55 | Graeserite | (Fe3+,Ti)4Ti3AsO13(OH) | Mon. |
| 4.JB.60 | Hemloite | (Ti,V3+,Fe3+,Al)12(As3+,Sb3+)2O23(OH) | Tric. 1 : P1 |
| 4.JB.65 | Freedite | Cu+Pb8(AsO3)2O3Cl5 | Mon. 2/m : B2/m |
| 4.JB.70 | Georgiadèsite | Pb4(AsO3)Cl4(OH) | Mon. |
| 4.JB.75 | Ekatite | (Fe3+,Fe2+,Zn)12(AsO3)6(AsO3,HSiO4)2(OH)6 | Hex. |
Other Information
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 Fetiasite
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 Fetiasite
mindat.org URL:
https://www.mindat.org/min-1542.html
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Localities for Fetiasite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Australia | |
| 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) | |
| American Mineralogist, Volume 79, pages 996-1002, 1994 |
Switzerland | |
| No reference listed |
| 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 |
Lercheltini area, Binn Valley, Valais, Switzerland