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Lindsleyite Mineral Data
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General Lindsleyite Information
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 Chemical Formula: |
(Ba,Sr)(Ti,Cr,Fe,Mg)21O38 |
| Composition: |
Molecular Weight = 1,763.22 gm |
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Barium 5.84 % Ba 6.52 % BaO |
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Strontium 1.24 % Sr 1.47 % SrO |
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Magnesium 0.69 % Mg 1.14 % MgO |
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Titanium 35.30 % Ti 58.89 % TiO2 |
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Chromium 17.69 % Cr 23.14 % CrO |
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Iron 4.75 % Fe 6.11 % FeO |
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Oxygen 34.48 % O |
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______ ______ |
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100.00 % 97.28 % = TOTAL OXIDE |
| Empirical Formula: |
Ba0.75Sr0.25Ti13Cr6Fe2+1.5Mg0.5O38 |
| Environment: |
In kimberlite and peridotite nodules. |
| IMA Status: |
Approved IMA 1983 |
| Locality: |
DeBeers mine, Kimberley, Cape Province, South Africa. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Donald H. Lindsley (1934-), mineralogist, Department of Earth Sciences, State University of New York at Stony Brook. |
| Name Pronunciation: |
Lindsleyite + Pronunciation  |
| Synonym: |
ICSD 81584 |
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PDF 37-421 |
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Lindsleyite Image |
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Images:
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Lindsleyite
Comments: Lindsleyite (L) enclosing chrome spinel (C) and surrounded by chrome diopside (Cpx). Sample JJG-360, Bultfontein. B&W reflected light in air. (AmMin, v68:494).
Location: Metasomatized peridotites and heavy media concentrates from four kimberlites in the Republic of South Africa.
Scale: Scale Bar 0.2 mm.
© American Mineralogist |
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Lindsleyite Crystallography
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| Axial Ratios: |
a:c = 1:1.97878 |
| Cell Dimensions: |
a = 10.37, c = 20.52, Z = 3; V = 1,911.02 Den(Calc)= 4.60 |
| Crystal System: |
Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: R 3 |
| X Ray Diffraction: |
By Intensity(I/Io): 1.59(1), 1.8(1), 2.13(1), |
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Physical Properties of Lindsleyite
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| Cleavage: |
None |
| Color: |
Black. |
| Density: |
4.63 |
| Diaphaneity: |
Opaque |
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). |
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Hardness: |
7.5 - Garnet |
| Luster: |
Metallic |
| Streak: |
gray |
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Optical Properties of Lindsleyite
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| Optical Data: |
Uniaxial (?). |
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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
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| RL Anisotrophism: |
Weak, pale tan to brown. |
| RL Color: |
Tan. |
| RL Pleochroism: |
Weak, buff-white to tan. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Lindsleyite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
19.40 |
19.80 |
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| 420 nm |
19.00 |
19.20 |
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| 440 nm |
18.60 |
18.90 |
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| 460 nm |
18.10 |
18.40 |
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| 480 nm |
17.80 |
18.10 |
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| 500 nm |
17.50 |
17.80 |
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| 520 nm |
17.20 |
17.50 |
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| 540 nm |
17.10 |
17.30 |
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| 560 nm |
16.90 |
17.10 |
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| 580 nm |
16.70 |
17.00 |
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| 600 nm |
16.70 |
16.90 |
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| 620 nm |
16.60 |
16.90 |
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| 640 nm |
16.50 |
16.80 |
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| 660 nm |
16.50 |
16.90 |
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| 680 nm |
16.50 |
16.90 |
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| 700 nm |
16.50 |
16.90 |
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Calculated Relative Intensity Colors of Lindsleyite in Air
Relative
Intensity |
0% |
60% |
100% |
120% |
180% |
240% |
300% |
360% |
420% |
480% |
520% |
| R1 |
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| R2 |
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Calculated Properties of Lindsleyite
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| Electron Density: |
Bulk Density (Electron Density)=4.33 gm/cc
note: Specific Gravity of Lindsleyite =4.60 gm/cc.
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| Fermion Index: |
Fermion Index = 0.07
Boson Index = 0.93 |
| Photoelectric: |
PELindsleyite = 37.77 barns/electron
U=PELindsleyite x rElectron Density= 163.66 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lindsleyite is Not Radioactive |
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Lindsleyite Classification
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| Dana Class: |
08.05.01.08 (08)Multiple Oxides with Nb, Ta, and Ti |
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(08.05)Dana Type |
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(08.05.01)Crichtonite group (ABC18 T2 O38) |
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08.05.01.01 Landauite NaMnZn2(Ti,Fe)6Ti12O38 R 3 3 |
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08.05.01.02 Loveringite (Ca,Ce)(Ti,Fe,Cr,Mg)21O38 R 3 3 |
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08.05.01.03 Crichtonite (Sr,La,Ce,Y)(Ti,Fe,Mn)21O38 R 3 3 |
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08.05.01.04 Senaite Pb(Ti,Fe,Mn)21O38 R 3 3 |
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08.05.01.05 Davidite-(La) (La,Ce,Ca)(Y,U)(Ti,Fe)20O38 R 3 3 |
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08.05.01.06 Davidite-(Ce) (Ce,La)(Y,U)(Ti,Fe)20O38 R 3 3 |
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08.05.01.07 Mathiasite (K,Ca,Sr)(Ti,Cr,Fe,Mg)21O38 R 3 3 |
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08.05.01.08 Lindsleyite (Ba,Sr)(Ti,Cr,Fe,Mg)21O38 R 3 3 |
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08.05.01.09 Dessauite! (Sr,Pb)(Y,U)(Ti,Fe)20O38 P 3 3 |
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08.05.01.10 Cleusonite! Pb(U,U)(Ti,Fe,Fe)20(O,OH)38 R 3 3 |
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08.05.01.11 Gramaccioliite-(Y)! (Pb,Sr)(Y,Mn)Fe2(Ti,Fe)18O38 R 3 3 |
| Strunz Class: |
04.CC.40 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.C - Metal:Oxygen = 2:3, 3:5, and Similar |
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04.CC -With large and medium-sized cations |
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04.CC.40 Crichtonite (Sr,La,Ce,Y)(Ti,Fe,Mn)21O38 R 3 3 |
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04.CC.40 Dessauite! (Sr,Pb)(Y,U)(Ti,Fe)20O38 P 3 3 |
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04.CC.40 Davidite-(Ce) (Ce,La)(Y,U)(Ti,Fe)20O38 R 3 3 |
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04.CC.40 Davidite-(La) (La,Ce,Ca)(Y,U)(Ti,Fe)20O38 R 3 3 |
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04.CC.40 Mathiasite (K,Ca,Sr)(Ti,Cr,Fe,Mg)21O38 R 3 3 |
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04.CC.40 Lindsleyite (Ba,Sr)(Ti,Cr,Fe,Mg)21O38 R 3 3 |
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04.CC.40 Landauite NaMnZn2(Ti,Fe)6Ti12O38 R 3 3 |
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04.CC.40 Loveringite (Ca,Ce)(Ti,Fe,Cr,Mg)21O38 R 3 3 |
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04.CC.40 Senaite Pb(Ti,Fe,Mn)21O38 R 3 3 |
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04.CC.40 Cleusonite! Pb(U,U)(Ti,Fe,Fe)20(O,OH)38 R 3 3 |
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04.CC.40 Gramaccioliite-(Y)! (Pb,Sr)(Y,Mn)Fe2(Ti,Fe)18O38 R 3 3 |
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Other Lindsleyite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic3) |
| 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 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST
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Lindsleyite
(Ba,Sr)(Ti,Cr,Fe,Mg)21O38
Dana No: 08.05.01.08 Strunz No: 04.CC.40
Locality:
Notes:
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