Landauite Mineral Data

Landauite Mineral Data
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General Landauite Information

Help on Chemical Formula: Chemical Formula: NaMnZn2(Ti,Fe+++)6Ti12O38
Help on Composition: Composition: Molecular Weight = 1,730.91 gm
   Potassium   0.45 %  K     0.54 % K2O
   Sodium      0.93 %  Na    1.25 % Na2O
   Titanium   43.43 %  Ti   72.45 % TiO2
   Manganese   3.17 %  Mn    4.10 % MnO
   Zinc        8.69 %  Zn   10.81 % ZnO
   Iron        5.81 %  Fe    7.47 % FeO
   Lead        2.39 %  Pb    2.58 % PbO
   Oxygen     35.12 %  O
             ______        ______ 
             100.00 %       99.21 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.7K0.2Pb0.2Mn2+Zn2.3Ti15.7Fe2+1.8O38
Help on Environment: Environment: Accessory mineral in albite veins cutting syenite pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1966
Help on Locality: Locality: Burpala massif, 120 km norht of Lake Baikal, eastern Siberia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Lev Davidovich Landau (1908-1968), noted Russian physicist.
Help on Name Pronunciation: Name Pronunciation: Landauite + Pronunciation Say LANDAUITE
Help on Synonym: Synonym: ICSD 200416
  PDF 18-672
 

Landauite Image

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Landauite

Comments: Black granular landauite in matrix.
Location: Northwest Territories, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Landauite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:2.00366
Help on Cell Dimensions: Cell Dimensions: a = 10.366, c = 20.77, Z = 3; V = 1,932.81 Den(Calc)= 4.46
Help on Crystal System: Crystal System: Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.83(1), 2.11(0.9), 1.78(0.8),
Click Here for Large Landauite Structure Window Crystal Structure:

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Grey I E , Gatehouse B M , The Canadian Mineralogist , 16 (1978) p.63-68, The crystal structure of landauite, Na[MnZn2(Ti,Fe)6Ti12]O38

 

Physical Properties of Landauite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black.
Help on Density: Density: 4.42
Help on Diaphaneity: Diaphaneity: Subtranslucent to Opaque
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 7.5 - Garnet
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: gray
 

Optical Properties of Landauite

Help on Dichroism (e): Dichroism (e): bottle green.
Help on Dichroism (w): Dichroism (w): green.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.064 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3095,KPDmeas= 0.3123,KC= 0.3308
Ncalc = 2.46 - 2.48
Help on Optical Data: Optical Data: Uniaxial (-), e=2.373, w=2.388, bire=0.0150.
 

Calculated Properties of Landauite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.18 gm/cc
note: Specific Gravity of Landauite =4.42 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PELandauite = 53.26 barns/electron
U=PELandauite x relectron= 222.55 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 6.17 (Gamma Ray American Petroleum Institute Units)
Concentration of Landauite per GRapi unit = 16.22 (%)

Estimated Radioactivity from Landauite - barely detectable

 

Landauite Classification
Help on Dana Class: Dana Class: 08.05.01.01 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.05)Dana Type
  (08.05.01)Crichtonite group (ABC18 T2 O38)
 
08.05.01.01 Landauite NaMnZn2(Ti,Fe)6Ti12O38 R 3 3
 
08.05.01.02 Loveringite (Ca,Ce)(Ti,Fe,Cr,Mg)21O38 R 3 3
 
08.05.01.03 Crichtonite (Sr,La,Ce,Y)(Ti,Fe,Mn)21O38 R 3 3
 
08.05.01.04 Senaite Pb(Ti,Fe,Mn)21O38 R 3 3
 
08.05.01.05 Davidite-(La) (La,Ce,Ca)(Y,U)(Ti,Fe)20O38 R 3 3
 
08.05.01.06 Davidite-(Ce) (Ce,La)(Y,U)(Ti,Fe)20O38 R 3 3
 
08.05.01.07 Mathiasite (K,Ca,Sr)(Ti,Cr,Fe,Mg)21O38 R 3 3
 
08.05.01.08 Lindsleyite (Ba,Sr)(Ti,Cr,Fe,Mg)21O38 R 3 3
 
08.05.01.09 Dessauite! (Sr,Pb)(Y,U)(Ti,Fe)20O38 P 3 3
 
08.05.01.10 Cleusonite! Pb(U,U)(Ti,Fe,Fe)20(O,OH)38 R 3 3
 
08.05.01.11 Gramaccioliite-(Y)! (Pb,Sr)(Y,Mn)Fe2(Ti,Fe)18O38 R 3 3
Help on Strunz Class: Strunz Class: 04.CC.40 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.40 Crichtonite (Sr,La,Ce,Y)(Ti,Fe,Mn)21O38 R 3 3
 
04.CC.40 Dessauite! (Sr,Pb)(Y,U)(Ti,Fe)20O38 P 3 3
 
04.CC.40 Davidite-(Ce) (Ce,La)(Y,U)(Ti,Fe)20O38 R 3 3
 
04.CC.40 Davidite-(La) (La,Ce,Ca)(Y,U)(Ti,Fe)20O38 R 3 3
 
04.CC.40 Mathiasite (K,Ca,Sr)(Ti,Cr,Fe,Mg)21O38 R 3 3
 
04.CC.40 Lindsleyite (Ba,Sr)(Ti,Cr,Fe,Mg)21O38 R 3 3
 
04.CC.40 Landauite NaMnZn2(Ti,Fe)6Ti12O38 R 3 3
 
04.CC.40 Loveringite (Ca,Ce)(Ti,Fe,Cr,Mg)21O38 R 3 3
 
04.CC.40 Senaite Pb(Ti,Fe,Mn)21O38 R 3 3
 
04.CC.40 Cleusonite! Pb(U,U)(Ti,Fe,Fe)20(O,OH)38 R 3 3
 
04.CC.40 Gramaccioliite-(Y)! (Pb,Sr)(Y,Mn)Fe2(Ti,Fe)18O38 R 3 3
 

Other Landauite Information
Help on References: References: NAME( AntBidBlaNic3) 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 Landauite :
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
15 - WWW-MINCRYST

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

Landauite

NaMnZn2(Ti,Fe+++)6Ti12O38
Dana No: 08.05.01.01 Strunz No: 04.CC.40
Locality:

 

Notes: