Lindsleyite Mineral Data + Say LINDSLEYITE

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General Lindsleyite Information
Help on Chemical Formula: Chemical Formula: (Ba,Sr)(Ti,Cr,Fe,Mg)21O38
Help on Composition: Composition: Molecular Weight = 1,763.22 gm
   Barium      5.84 %  Ba    6.52 % BaO
   Strontium   1.24 %  Sr    1.47 % SrO
   Magnesium   0.69 %  Mg    1.14 % MgO
   Titanium   35.30 %  Ti   58.89 % TiO2
   Chromium   17.69 %  Cr   23.14 % CrO
   Iron        4.75 %  Fe    6.11 % FeO
   Oxygen     34.48 %  O
             ______        ______ 
             100.00 %       97.28 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba0.75Sr0.25Ti13Cr6Fe2+1.5Mg0.5O38
Help on Environment: Environment: In kimberlite and peridotite nodules.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: DeBeers mine, Kimberley, Cape Province, South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Donald H. Lindsley (1934-), mineralogist, Department of Earth Sciences, State University of New York at Stony Brook.
Help on Synonym: Synonym: ICSD 81584
  PDF 37-421
 

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Lindsleyite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.97878
Help on Cell Dimensions: Cell Dimensions: a = 10.37, c = 20.52, Z = 3; V = 1,911.02 Den(Calc)= 4.60
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): 1.59(1), 1.8(1), 2.13(1),
Click Here for Large Lindsleyite Structure Window Crystal Structure:

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Peterson R C , Grey I E , The Canadian Mineralogist , 33 (1995) p.1083-1089, Preparation and structure refinement of synthetic Ti-containing, lindsleyite, BaMn3Ti18O38

 

Physical Properties of Lindsleyite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black.
Help on Density: Density: 4.63
Help on Diaphaniety: Diaphaniety: 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: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 7.5 - Garnet
Help on Luster: Luster: Metallic
Help on Streak: Streak: gray
 

Optical Properties of Lindsleyite

Help on Optical Data: Optical Data: Uniaxial (?).
  NCalc= 2.39 - from Gladstone-Dale relationship (KC = 0.3024) where Ncalc=Dcalc*KC+1
NCalc= 2.4 - from Gladstone-Dale relationship (KC = 0.3024) where Ncalc=Dmeas*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Weak, pale tan to brown.
Help on RL Color: RL Color: Tan.
Help on RL Pleochroism: RL Pleochroism: Weak, buff-white to tan.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Lindsleyite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   19.40   19.80 
   
 420 nm   19.00   19.20 
 440 nm   18.60   18.90 
 460 nm   18.10   18.40 
 480 nm   17.80   18.10 
 500 nm   17.50   17.80 
 520 nm   17.20   17.50 
 540 nm   17.10   17.30 
 560 nm   16.90   17.10 
 580 nm   16.70   17.00 
 600 nm   16.70   16.90 
 620 nm   16.60   16.90 
 640 nm   16.50   16.80 
 660 nm   16.50   16.90 
 680 nm   16.50   16.90 
 700 nm   16.50   16.90 
Calculated Relative Intensity Colors of Lindsleyite in Air
Relative
Intensity		    0%   60% 100% 120% 180% 240% 300% 360% 420% 480% 520%
R1                      
R2                      
 

Calculated Properties of Lindsleyite

Help on Electron Density: Electron Density:

relectron=4.33 gm/cc
note: rLindsleyite =4.60 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.07559
Boson Index = 0.92441
Help on Photoelectric: Photoelectric:

PELindsleyite = 37.77 barns/electron
U=PELindsleyite x relectron= 163.66 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Lindsleyite is Not Radioactive
 

Lindsleyite Classification
Help on Dana Class: Dana Class: 8.5.1.8 (8)Multiple Oxides with Nb, Ta, and Ti
  (8.5)Dana Type
  (8.5.1)Crichtonite group (ABC18 T2 O38)
 
8.5.1.1 Landauite NaMnZn2(Ti,Fe)6Ti12O38 R 3 3
 
8.5.1.2 Loveringite (Ca,Ce)(Ti,Fe,Cr,Mg)21O38 R 3 3
 
8.5.1.3 Crichtonite (Sr,La,Ce,Y)(Ti,Fe,Mn)21O38 R 3 3
 
8.5.1.4 Senaite Pb(Ti,Fe,Mn)21O38 R 3 3
 
8.5.1.5 Davidite-(La) (La,Ce,Ca)(Y,U)(Ti,Fe)20O38 R 3 3
 
8.5.1.6 Davidite-(Ce) (Ce,La)(Y,U)(Ti,Fe)20O38 R 3 3
 
8.5.1.7 Mathiasite (K,Ca,Sr)(Ti,Cr,Fe,Mg)21O38 R 3 3
 
8.5.1.8 Lindsleyite (Ba,Sr)(Ti,Cr,Fe,Mg)21O38 R 3 3
 
8.5.1.9 Dessauite! (Sr,Pb)(Y,U)(Ti,Fe)20O38 P 3 3
 
8.5.1.10 Cleusonite! Pb(U,U)(Ti,Fe2,Fe3)20(O,OH)38 R 3 3
 
8.5.1.11 Gramaccioliite-(Y)! (Pb,Sr)(Y,Mn)Fe2(Ti,Fe)18O38 R 3 3
Help on Strunz Class: Strunz Class: IV/C.09-50 IV - Oxides
  IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)
  IV/C.09 - Crichtonite group
 
IV/C.09-10 Landauite NaMnZn2(Ti,Fe)6Ti12O38 R 3 3
 
IV/C.09-20 Mathiasite (K,Ca,Sr)(Ti,Cr,Fe,Mg)21O38 R 3 3
 
IV/C.09-30 Loveringite (Ca,Ce)(Ti,Fe,Cr,Mg)21O38 R 3 3
 
IV/C.09-40 Crichtonite (Sr,La,Ce,Y)(Ti,Fe,Mn)21O38 R 3 3
 
IV/C.09-45 Dessauite! (Sr,Pb)(Y,U)(Ti,Fe)20O38 P 3 3
 
IV/C.09-50 Lindsleyite (Ba,Sr)(Ti,Cr,Fe,Mg)21O38 R 3 3
 
IV/C.09-60 Davidite-(La) (La,Ce,Ca)(Y,U)(Ti,Fe)20O38 R 3 3
 
IV/C.09-62 Gramaccioliite-(Y)! (Pb,Sr)(Y,Mn)Fe2(Ti,Fe)18O38 R 3 3
 
IV/C.09-70 Davidite-(Ce) (Ce,La)(Y,U)(Ti,Fe)20O38 R 3 3
 
IV/C.09-80 Senaite Pb(Ti,Fe,Mn)21O38 R 3 3
 

Other Lindsleyite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Lindsleyite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - MinDAT
9 - MinMax(Deutsch)
10 - MinMax(English)
11 - Mineralienatlas (Deutsch)
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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

Lindsleyite

(Ba,Sr)(Ti,Cr,Fe,Mg)21O38
Dana No: 8.5.1.8 Strunz No: IV/C.09-50
Locality:

 

Notes:

 
 
   
 
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