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Ungursaite Mineral Data

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General Ungursaite Information

Help on Chemical  Formula: Chemical Formula: NaCa5(Ta,Nb)24O65(OH)
Help on Composition: Composition: Molecular Weight = 5,094.85 gm
   Sodium     0.45 %  Na    0.61 % Na2O
   Calcium    3.93 %  Ca    5.50 % CaO
   Tantalum  63.93 %  Ta   78.06 % Ta2O5
   Niobium   10.94 %  Nb   15.65 % Nb2O5
   Hydrogen   0.02 %  H     0.18 % H2O
   Oxygen    20.73 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCa5Ta18Nb6O65(OH)
Help on Environment: Environment: Occurs in the margins of thoreaulite crystals from granitic pegmatite.
Help on IMA Status: IMA Status: Not Approved IMA 1988 - Published 1985
Help on Locality: Locality: Ungursai, East Kazakhstan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: ICSD 65336
  PDF 15-679
 

Ungursaite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:5.9183
Help on Cell Dimensions: Cell Dimensions: a = 6.218, c = 36.8, Z = 1; V = 1,232.20 Den(Calc)= 6.87
Help on Crystal System: Crystal System: Hexagonal Space Group: P 63/m,P 63
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.776(1), 3.01(1), 6.16(1),
 

Physical Properties of Ungursaite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 7 - Quartz
Help on Luminescence: Luminescence: Cathodoluminescence, Short UV=yellow green.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white
 

Optical Properties of Ungursaite

Help on Optical Data: Optical Data: NCalc= 2.19 - from Gladstone-Dale relationship (KC = 0.1731) where Ncalc=Dcalc*KC+1
 

Calculated Properties of Ungursaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.93 gm/cc
note: Specific Gravity of Ungursaite =6.87 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.000229327
Boson Index = 0.999770673
Help on Photoelectric: Photoelectric: PEUngursaite = 780.76 barns/electron
U=PEUngursaite x rElectron Density=4,632.27 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ungursaite is Not Radioactive
 

Ungursaite Classification

Help on  Dana Class: Dana Class: 04.00.00.00 (04)Oxide Minerals
  (04.00)Without Dana Classification Numbers
  (04.00.00)Oxide, Basic
 
04.00.00.00 Ashanite? (Nb,Ta,U,Fe,Mn)4O8 Pcan 2/m 2/m 2/m
 
04.00.00.00 Chubutite* Pb7O6Cl2 Unk Ortho
 
04.00.00.00 Clinobirnessite* Na4Mn14O27•9(H2O) Mono
 
04.00.00.00 Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m
 
04.00.00.00 IMA2008-022 UO2(OH)2 pseudo-orthorhombic Mono
 
04.00.00.00 Krasnogorite* WO3 Pmnb 2/m 2/m 2/m
 
04.00.00.00 Mengxianminite* (Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29 Unk Ortho
 
04.00.00.00 Romanite* (Fe,U,Pb)2(Ti,Fe)O4 Trig ? Trig
 
04.00.00.00 Tantalowodginite* (Mn2,[])4Ta4Ta8O32 C 2/c 2/m
 
04.00.00.00 Ungursaite* NaCa5(Ta,Nb)24O65(OH) P 63/m,P 63 Hex
 
04.00.00.00 Wolframoixiolite* (Fe,Mn,Nb)(Nb,W,Ta)O4 Pc 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 -Oxide, Basic
 
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 Ungursaite Information

Help on References: References: NAME( AmMin, v71:1546) PHYS. PROP.(Am.Min.,Vol.71,p1546,1986)
Help on See Also: See Also: Links to other databases for Ungursaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - WWW-MINCRYST

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Ungursaite

NaCa5(Ta,Nb)24O65(OH)
Dana No: 04.00.00.00 Strunz No: 04.XX.00
Locality:

 

Notes:

 

 
   
 


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