Struverite Mineral Data (original) (raw)

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. Str�verite (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:

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](../data/Methane hydrate-I.shtml)! 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](../data/Methane hydrate-II.shtml)! 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](../data/Methane hydrate-H.shtml)! 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 - 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:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Struverite :

A Bijoux Google Search for Struverite
Adam'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 :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

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: