General Struverite Information![]() (Ti,Ta,Fe+++)O2 |
![]() Molecular Weight = 117.38 gm |
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Tantalum 30.83 % Ta 37.65 % Ta2O5 |
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Titanium 24.48 % Ti 40.83 % TiO2 |
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Niobium 7.92 % Nb 11.32 % Nb2O5 |
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Iron 9.52 % Fe 12.24 % FeO |
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Oxygen 27.26 % O |
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100.00 % 102.04 % = TOTAL OXIDE |
![]() Ti0.6Ta0.2Fe2+0.2Nb0.1O2 |
![]() Late primary mineral in granite pegmatites. Strüverite (1907) is now considered Ta-bearing rutile. |
![]() Discredited IMA 2006 |
![]() Craveggia, Val Vigezzo, Peidmont, Italy. Link to MinDat.org Location Data. |
![]() Named for Giovanni Struver (1842-1915), mineralogist, University of Rome, Italy. |
![]() Struverite + Pronunciation |
![]() ![]() Strueverite |
| | Struverite Image
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Struverite Crystallography![]() a:c = 1:0.64564 |
![]() a = 4.645, c = 2.999, Z = 2; V = 64.71 Den(Calc)= 6.02 |
![]() Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/mnm |
![]() By Intensity(I/Io): 1.707(1), 3.28(1), 2.52(0.9), |
| Physical Properties of Struverite![]() {110} Distinct |
![]() Black, Black. |
![]() 5.25 |
![]() Opaque |
![]() Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). |
![]() Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
![]() Pyramidal - Crystals are shaped like pyramids. |
![]() Twinning Common - Crystals are usually twinned. |
![]() 6-6.5 - Orthoclase-Pyrite |
![]() Adamantine - Resinous |
![]() grayish black |
| Optical Properties of Struverite![]() green dark bluish or greenish blue. |
![]() brown. |
![]() Uniaxial (+). |
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NCalc= 2.63 - from Gladstone-Dale relationship (KC = 0.2707) where Ncalc=Dcalc*KC+1 |
NCalc= 2.42 - from Gladstone-Dale relationship (KC = 0.2707) where Ncalc=Dmeas*KC+1 | Calculated Properties of Struverite![]() Bulk Density (Electron Density)=5.45 gm/cc |
note: Specific Gravity of Struverite =6.02 gm/cc. ![]() Fermion Index = 0.03 |
Boson Index = 0.97 ![]() PEStruverite = 370.63 barns/electron |
U=PEStruverite x rElectron Density=2,018.76 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Struverite is Not Radioactive | Struverite Classification![]() 04.04.01.03 (04)Simple Oxides |
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(04.04)with a cation charge of 4+ (A++++ O2) |
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(04.04.01)Rutile group (Tetragonal: P4/mnm) |
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![]() 04.XX.00 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.X - Unclassified Strunz OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, telluri |
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04.XX -Rutile Group |
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| Other Struverite Information![]() NAME( AntBidBlaNic3) PHYS. PROP.(AntBidBlaNic3) OPTIC PROP.(AntBidBlaNic3) |
![]() Links to other databases for Struverite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Struverite using: Visit our Advertisers for Struverite : A Bijoux Google Search for StruveriteAdam's Minerals Google Search for Struverite Cape Minerals Google Search for Struverite Dakota Matrix Minerals Google Search for Struverite Excalibur Mineral Corp. Google Search for Struverite Exceptional Minerals Google Search for Struverite John Betts Fine Minerals Search for Struverite McDougall Minerals Google Search for Struverite Mineral News Website Link Rock and Mineral Shows Google Search for Struverite Weinrich Minerals, Inc. Google Search for Struverite Ask about Struverite here : Print or Cut-and-Paste your Struverite Specimen Label here :
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