Lueshite Mineral Data

Lueshite Mineral Data
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General Lueshite Information

Help on Chemical Formula: Chemical Formula: NaNbO3
Help on Composition: Composition: Molecular Weight = 163.89 gm
   Sodium   14.03 %  Na   18.91 % Na2O
   Niobium  56.69 %  Nb   81.09 % Nb2O5
   Oxygen   29.29 %  O
           ______        ______ 
           100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaNbO3
Help on IMA Status: IMA Status: Approved IMA 1959
Help on Locality: Locality: Lueshe, Goma, Congo, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Lueshite Say LUESHITE
Help on Synonym: Synonym: ICSD 39624
  PDF 33-1270
 

Lueshite Image

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Lueshite

Comments: Opaque, brownish, pseudo-cubic crystals of lueshite.
Location: Republic of Congo. Scale: Crystal size 8 mm.
© John Attard

Lueshite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9963:1:2.8028
Help on Cell Dimensions: Cell Dimensions: a = 5.51, b = 5.53, c = 15.5, Z = 8; V = 472.29 Den(Calc)= 4.61
Help on Crystal System: Crystal System: Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 2221
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.76(1), 3.9(0.85), 1.95(0.7),
Click Here for Large Lueshite Structure Window Crystal Structure:

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von der Muhll R , Sadel A , Hagenmuller P , Journal of Solid State Chemistry , 51 (1984) p.176-182, Structure cristalline a 295K de la phase ferroelectrique Li0.02Na0.98Nb O3, Locality: synthetic, Note: x(O3) corrected to match reported bond lengths

 

Physical Properties of Lueshite

Help on Cleavage: Cleavage: {001} Indistinct
Help on Color: Color: Black, Brown.
Help on Density: Density: 4.44
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Adamantine - Metallic
Help on Streak: Streak: gray
 

Optical Properties of Lueshite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.156 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.113 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.282,KPDmeas= 0.2928,KC= 0.2533
Ncalc = 2.12 - 2.17
Help on Optical Data: Optical Data: Biaxial (?), b=2.3, 2V(Meas)=45.
 

Calculated Properties of Lueshite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.28 gm/cc
note: Specific Gravity of Lueshite =4.61 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001405731
Boson Index = 0.9998594269
Help on Photoelectric: Photoelectric: PELueshite = 86.63 barns/electron
U=PELueshite x rElectron Density= 370.37 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lueshite is Not Radioactive
 

Lueshite Classification
Help on Dana Class: Dana Class: 04.03.03.04 (04)Simple Oxides
  (04.03)with a cation charge of 3+ (A+++2 O3)
  (04.03.03)Perovskite Group
 
04.03.03.01 Perovskite CaTiO3 P nma 2/m 2/m 2/m
 
04.03.03.02 Latrappite (Ca,Na)(Nb,Ti,Fe)O3 Pcmn 2/m 2/m 2/m
 
04.03.03.03 Loparite-(Ce) (Ce,Na,Ca)2(Ti,Nb)2O6 P m3m 4/m 3 2/m
 
04.03.03.04 Lueshite NaNbO3 P 2221 2 2 2
 
04.03.03.05 Tausonite SrTiO3 P m3m 4/m 3 2/m
 
04.03.03.06 Isolueshite! (Na,La,Ca)(Nb,Ti)O3 P m3m 4/m 3 2/m
 
04.03.03.07 Barioperovskite! BaTiO3 Amm2 mm2
 
04.03.03.08 Lakargiite! CaZrO3 P nma 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: 04.CC.30 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.C - Metal:Oxygen = 2:3, 3:5, and Similar
  04.CC -With large and medium-sized cations
 
04.CC.30 Natroniobite NaNbO3 Mono
 
04.CC.30 Latrappite (Ca,Na)(Nb,Ti,Fe)O3 Pcmn 2/m 2/m 2/m
 
04.CC.30 Lueshite NaNbO3 P 2221 2 2 2
 
04.CC.30 Perovskite CaTiO3 P nma 2/m 2/m 2/m
 
04.CC.30 Barioperovskite! BaTiO3 Amm2 mm2
 
04.CC.30 Lakargiite! CaZrO3 P nma 2/m 2/m 2/m
 

Other Lueshite Information
Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Lueshite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info

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

Lueshite

NaNbO3
Dana No: 04.03.03.04 Strunz No: 04.CC.30
Locality:

 

Notes: