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Struverite Mineral Data + |
General Struverite Information |
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| (Ti,Ta,Fe+++)O2 | |||
| Molecular Weight = 117.38 gm | |||
| Tantalum 30.83 % Ta 37.65 % Ta2O5 | |||
| Titanium 24.48 % Ti 40.83 % TiO2 | |||
| Niobium 7.92 % Nb 11.32 % Nb2O5 | |||
| Iron 9.52 % Fe 12.24 % FeO | |||
| Oxygen 27.26 % O | |||
| ______ ______ | |||
| 100.00 % 102.04 % = TOTAL OXIDE | |||
| Ti0.6Ta0.2Fe2+0.2Nb0.1O2 | |||
| Late primary mineral in granite pegmatites. | |||
| Valid Species (Pre-IMA) 1907 | |||
| Craveggia, Val Vigezzo, Peidmont, Italy. Link to MinDat.org Location Data. | |||
| Named for Giovanni Struver (1842-1915), mineralogist, University of Rome, Italy. | |||
| Strueverite | |||
Struverite Image | |||
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Struverite Crystallography |
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| 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 |
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| [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 |
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| green dark bluish or greenish blue. | |||
| brown. | |||
| Uniaxial (+). | |||
| 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 |
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Calculated Properties of Struverite |
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relectron=5.45 gm/cc |
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| Fermion Index = 0.03383 Boson Index = 0.96617 |
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PEStruverite = 370.63 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Struverite is Not Radioactive |
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Struverite Classification |
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| 4.4.1.3 (4)Simple Oxides | |||
| (4.4)with a cation charge of 4+ (A++++ O2) | |||
| (4.4.1)Rutile group (Tetragonal: P4/mnm) | |||
| IV/D.03-20 IV - Oxides | |||
| IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds) | |||
| IV/D.03 - Rutile group, Ilmenorutile - Strüverite series | |||
Other Struverite Information |
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| 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris Search for Struverite using: Visit our Advertisers for Struverite : Translate Struverite Mineral Data : Ask about Struverite here : Print or Cut-and-Paste your Struverite Specimen Label here :
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