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Strüverite
A variety of Rutile
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About Strüverite
Formula:
(Ti,Ta,Fe)O2
Hardness:
6 - 6½
Name:
Named after Giovanni Strüver (1842-1915), Professor of Mineralogy, University of Rome, Rome, Italy.
A Ta- and Fe-bearing variety of rutile.
Compare also ilmenorutile. The name strüverite has been used if Ta > Nb. If Nb = Ta or Nb > Ta, the variety has been classified as ilmenorutile.
Compare also ilmenorutile. The name strüverite has been used if Ta > Nb. If Nb = Ta or Nb > Ta, the variety has been classified as ilmenorutile.
Name Encoding
ASCII-7:
Struverite
Unique Identifiers
Mindat ID:
3812 (as Strüverite)
3486 (as Rutile)
3486 (as Rutile)
Long-form identifier:
mindat:1:1:3812:2 (as Strüverite)
mindat:1:1:3486:5 (as Rutile)
mindat:1:1:3486:5 (as Rutile)
Similar Names
| Struveite | A synonym of Struvite |
| Strüverite (of Brezina) | A synonym of Chloritoid |
| Strüverite (of Zambonini) | A synonym |
Classification of Strüverite
4.4.1.3
4 : SIMPLE OXIDES
4 : AX2
4 : SIMPLE OXIDES
4 : AX2
18.1.50
18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U
18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U
Physical Properties of Strüverite
Hardness:
6 - 6½ on Mohs scale
Optical Data of Strüverite
Type:
Uniaxial (+)
Chemistry of Strüverite
Mindat Formula:
(Ti,Ta,Fe)O2
Elements listed:
Chemical Analysis
Oxide wt%:
| 1 | |
|---|---|
| TiO2 | 28 % |
| Nb2O5 | 13 % |
| Ta2O5 | 41 % |
| Fe2O3 | 14 % |
| SnO2 | 0.2 % |
| ZrO2 | 3.6 % |
| SrO2 | 0.1 % |
| Total: | 99.9 % |
Sample references:
Other Language Names for Strüverite
Common Associates
Associations Based on Photo Data:
| 3 photos of Strüverite associated with Tanteuxenite-(Y) | Y(Ta,Nb,Ti)2(O,OH)6 |
| 3 photos of Strüverite associated with Albite | Na(AlSi3O8) |
| 3 photos of Strüverite associated with Quartz | SiO2 |
| 3 photos of Strüverite associated with 'Uranmicrolite (of Hogarth 1977)' | (Ca,U,Na)2-x(Ta,Nb)2(O,OH)7 |
| 1 photo of Strüverite associated with Microcline | K(AlSi3O8) |
| 1 photo of Strüverite associated with Orthoclase | K(AlSi3O8) |
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.
Internet Links for Strüverite
mindat.org URL:
https://www.mindat.org/min-3812.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
Mineral Dealers:
References for Strüverite
Localities for Strüverite
Showing 74 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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 | |
| Jacobson et al. (2007) |
| Jacobson et al. (2007) |
| Econ Geol (1995) |
Brazil | |
| Specimen in the collection of Richard ... |
| Beurlen et al. (2008) |
| Revista Brasileira de Geociências 21 (1) |
| Beurlen et al. (2005) +1 other reference |
| Beurlen et al. (2013) | |
| Beurlen et al. (2008) |
| Beurlen et al. (2008) |
| Beurlen et al. (2008) | |
Bulgaria | |
| Svetoslav Petrussenko et al. (2007) |
Canada | |
| ontariominerals.com |
| Avalon Advanced Materials Inc. | |
| ontariominerals.com |
China | |
| Zhu et al. (2001) |
| Zhu et al. (2001) | |
| Zhu et al. (2001) +1 other reference | |
| National Geological Archives of China ... |
Czech Republic | |
| A. Tomek photo |
Finland | |
| Wilke (1976) |
France | |
| van den Berg (1987) |
Italy | |
| Roggiani (1970) +1 other reference |
| Callegari A. |
| P. Orlandi (1983) |
Kazakhstan | |
| Oitseva et al. (2017) |
| Jermolenko (2002) |
| Evseev (1995) |
Madagascar | |
| Lacroix (1922) |
| Jeff Scovil photo (photo-398372) |
| Mücke et al. (1978) |
| Pezzotta (1999) |
| Moore (2007) |
| Jason McAvoy collection & photo (Ex. Philadelphia Academy of Natural Sciences No. 21079) |
| Ungemach (1916) +1 other reference | |
| Lacroix (1922) |
| Ranorosoa (1986) |
| Lacroix (1922) |
| Pezzotta (2001) | |
Malaysia | |
| Geol. Soc. Malaysia |
| Hoe et al. (2003) |
Mozambique | |
| Wilson et al. (2000) |
| Lima de Faria et al. (1966) +1 other reference |
| Moiana (2010) |
Norway | |
| Kvamsdal et al. (2006) +1 other reference |
| Larsen (1982) |
Romania | |
| Hirtopanu (2006) |
| HÎRTOPANU et al. (2014) |
Russia | |
| Ryazantseva (2001) |
| Seltmann et al. (2010) | |
| Alekseev et al. (2020) |
| webcenter.ru (2002) |
| Grant (2001) |
Slovakia | |
| Uher et al. (2006) |
| Koděra et al. (1986) |
| Koděra et al. (1986) |
| Kubiš et al. (2003) | |
South Africa | |
| Cairncross et al. (1995) |
Spain | |
| Garófano-Medina et al. (2021) |
Thailand | |
| amdis.bgl.esdm.go.id (2016) |
UK | |
| |
Ukraine | |
| Liventseva (n.d.) |
USA | |
| Karl Estes (1998) +1 other reference |
| Eckel et al. (1997) |
| Eckel et al. (1997) |
| Eckel et al. (1997) |
| Freeport-McMoRan |
| Betts (1999) |
| Jarnot (1989) |
| Michael N. Spilde et al. (2016) |
| Smith et al. (2000) |
| Rocks & Minerals: 57: 160 &/or 60: 110 ... |
| USGS Prof Paper 297A +1 other reference | |
| T.W. Buchholz et al. (2000) |
Ialamitana Pegmatites, Sahanivotry Manandona, Antsirabe II District, Vakinankaratra, Madagascar