Struverite Mineral Data

Struverite Mineral Data
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General Struverite Information

Help on Chemical Formula: Chemical Formula: (Ti,Ta,Fe+++)O2
Help on Composition: Composition: 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
Help on Empirical Formula: Empirical Formula: Ti0.6Ta0.2Fe2+0.2Nb0.1O2
Help on Environment: Environment: Late primary mineral in granite pegmatites. Strüverite (1907) is now considered Ta-bearing rutile.
Help on IMA Status: IMA Status: Discredited IMA 2006
Help on Locality: Locality: Craveggia, Val Vigezzo, Peidmont, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Giovanni Struver (1842-1915), mineralogist, University of Rome, Italy.
Help on Name Pronunciation: Name Pronunciation: Struverite + Pronunciation Say STRUVERITE
Help on Synonym: Synonym: Strueverite
 

Struverite Image

Click Here for Larger Struverite Image in a New Browser Window Images:
Click Here for Larger Struverite Image

Struverite

Comments: Struverite crystal in white feldspar.
Location: Pisek, Jihocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Struverite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.64564
Help on Cell Dimensions: Cell Dimensions: a = 4.645, c = 2.999, Z = 2; V = 64.71 Den(Calc)= 6.02
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/mnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.707(1), 3.28(1), 2.52(0.9),
 

Physical Properties of Struverite

Help on Cleavage: Cleavage: {110} Distinct
Help on Color: Color: Black, Black.
Help on Density: Density: 5.25
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Pyramidal - Crystals are shaped like pyramids.
Help on Habit: Habit: Twinning Common - Crystals are usually twinned.
Help on Hardness: Hardness: 6-6.5 - Orthoclase-Pyrite
Help on Luster: Luster: Adamantine - Resinous
Help on Streak: Streak: grayish black
 

Optical Properties of Struverite

Help on Dichroism (e): Dichroism (e): green dark bluish or greenish blue.
Help on Dichroism (w): Dichroism (w): brown.
Help on Optical Data: Optical Data: 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
 

Calculated Properties of Struverite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.45 gm/cc
note: Specific Gravity of Struverite =6.02 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEStruverite = 370.63 barns/electron
U=PEStruverite x rElectron Density=2,018.76 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Struverite is Not Radioactive
 

Struverite Classification
Help on Dana Class: Dana Class: 04.04.01.03 (04)Simple Oxides
  (04.04)with a cation charge of 4+ (A++++ O2)
  (04.04.01)Rutile group (Tetragonal: P4/mnm)
 
04.04.01.01 Rutile TiO2 P 4/mnm 4/m 2/m 2/m
 
04.04.01.02 Ilmenorutile (Ti,Nb,Fe)O2 P 4/mnm 4/m 2/m 2/m
 
04.04.01.03 Struverite? (Ti,Ta,Fe)O2 P 4/mnm 4/m 2/m 2/m
 
04.04.01.04 Pyrolusite MnO2 P 4/mnm 4/m 2/m 2/m
 
04.04.01.05 Cassiterite SnO2 P 4/mnm 4/m 2/m 2/m
 
04.04.01.06 Plattnerite PbO2 P 4/mnm 4/m 2/m 2/m
 
04.04.01.07 Argutite GeO2 P 4/mnm 4/m 2/m 2/m
 
04.04.01.08 Squawcreekite? (Fe,Sb,W)O4•(H2O) P 4/mnm 4/m 2/m 2/m
 
04.04.01.09 Stishovite SiO2 P 4/mnm 4/m 2/m 2/m
Help on Strunz Class: Strunz Class: 04.XX.00 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.X - Unclassified Strunz OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, telluri
  04.XX -Rutile Group
 
04.XX.00 Ashanite? (Nb,Ta,U,Fe,Mn)4O8 Pcan 2/m 2/m 2/m
 
04.XX.00 Methane hydrate-I! 46(H2O)•2(S)•6(L) P m3n 4/m 3 2/m
 
04.XX.00 Clinobirnessite* Na4Mn14O27•9(H2O) Mono
 
04.XX.00 Chubutite* Pb7O6Cl2 Unk Ortho
 
04.XX.00 Kleberite* FeTi6O13•4(H2O)(?) P 63mcm ? 6mm
 
04.XX.00 Hongquiite* TiO F m3m 4/m 3 2/m
 
04.XX.00 Psilomelane? (Ba,H2O)2Mn5O10 A2/m 2/m
 
04.XX.00 Struverite? (Ti,Ta,Fe)O2 P 4/mnm 4/m 2/m 2/m
 
04.XX.00 Ungursaite* NaCa5(Ta,Nb)24O65(OH) P 63/m,P 63 Hex
 
04.XX.00 Uhligite? Ca3(Ti,Al,Zr)9O20 Unk Cubic
 
04.XX.00 Scheteligite? (Ca,Y,Sb,Mn)2(Ti,Ta,Nb,W)2O6(O,OH) Unk Ortho
 
04.XX.00 Allendeite! Sc4Zr3O12 R 3 3
 
04.XX.00 IMA2000-016! (Ti,Fe,Mg,Mn)1-xTi2O5 Pban 2/m 2/m 2/m
 
04.XX.00 Methane hydrate-II! 136(H2O)•16(S)•8(L) F d3m 4/m 3 2/m
 
04.XX.00 IMA2000-026! (Mn,Li)4(Ta,Sn)4(Ta,Nb)8O32 C 2/c 2/m
 
04.XX.00 Methane hydrate-H! 34(H2O)•3(S)•2(M)•1(L) P 6/mmm 6/m 2/m 2/m
 

Other Struverite Information
Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(AntBidBlaNic3) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Struverite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Struverite Specimen Label here :

Struverite

(Ti,Ta,Fe+++)O2
Dana No: 04.04.01.03 Strunz No: 04.XX.00
Locality:

 

Notes: