Lueshite Mineral Data + Say LUESHITE

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 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),
 

Physical Properties of Lueshite

Help on Cleavage: Cleavage: [001] Indistinct
Help on Color: Color: Black, Brown.
Help on Density: Density: 4.44
Help on Diaphaniety: Diaphaniety: 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= -0.114 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.282,KPDmeas= 0.2928,KC= 0.2533
Help on Optical Data: Optical Data: Biaxial (?), b=2.3, 2V(Meas)=45.
 

Calculated Properties of Lueshite

Help on Electron Density: Electron Density:

relectron=4.28 gm/cc
note: rLueshite =4.61 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00014
Boson Index = 0.99986
Help on Photoelectric: Photoelectric:

PELueshite = 86.63 barns/electron
U=PELueshite x relectron= 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: 4.3.3.4 (4)Simple Oxides
  (4.3)with a cation charge of 3+ (A+++2 O3)
  (4.3.3)Dana Group
 
4.3.3.1 Perovskite CaTiO3 P nma 2/m 2/m 2/m
 
4.3.3.2 Latrappite (Ca,Na)(Nb,Ti,Fe)O3 Pcmn 2/m 2/m 2/m
 
4.3.3.3 Loparite-(Ce) (Ce,Na,Ca)2(Ti,Nb)2O6 P m3m 4/m 3 2/m
 
4.3.3.4 Lueshite NaNbO3 P 2221 2 2 2
 
4.3.3.5 Tausonite SrTiO3 P m3m 4/m 3 2/m
 
4.3.3.6 Isolueshite! (Na,La,Ca)(Nb,Ti)O3 P m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: IV/C.10-60 IV - Oxides
  IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)
  IV/C.10 - Perowskite series
 
IV/C.10-10 Uhligite Ca3(Ti,Al,Zr)9O20 Unk Cubic
 
IV/C.10-20 Perovskite CaTiO3 P nma 2/m 2/m 2/m
 
IV/C.10-30 Latrappite (Ca,Na)(Nb,Ti,Fe)O3 Pcmn 2/m 2/m 2/m
 
IV/C.10-40 Tausonite SrTiO3 P m3m 4/m 3 2/m
 
IV/C.10-50 Loparite-(Ce) (Ce,Na,Ca)2(Ti,Nb)2O6 P m3m 4/m 3 2/m
 
IV/C.10-55 Isolueshite! (Na,La,Ca)(Nb,Ti)O3 P m3m 4/m 3 2/m
 
IV/C.10-60 Lueshite NaNbO3 P 2221 2 2 2
 
IV/C.10-70 Natroniobite NaNbO3 Mono
 
IV/C.10-80 Macedonite PbTiO3 P 4/mmm 4/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 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 -École des Mines de Paris

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Lueshite

NaNbO3
Dana No: 4.3.3.4 Strunz No: IV/C.10-60
Locality:

 

Notes:

 

 
   
 
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