General Baotite Information
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Chemical Formula: |
Ba4(Ti,Nb)8Si4O28Cl |
Composition: |
Molecular Weight = 1,582.82 gm |
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Barium 34.70 % Ba 38.75 % BaO |
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Titanium 17.54 % Ti 29.27 % TiO2 |
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Niobium 8.22 % Nb 11.76 % Nb2O5 |
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Iron 2.12 % Fe 2.72 % FeO |
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Silicon 7.10 % Si 15.18 % SiO2 |
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Chlorine 2.02 % Cl 2.02 % Cl |
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- % Cl -0.45 % -O=Cl2 |
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Oxygen 28.30 % O |
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______ ______ |
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100.00 % 99.24 % = TOTAL OXIDE |
Empirical Formula: |
Ba4Ti5.8Nb1.4Fe2+0.6Si4O28Cl0.9 |
Environment: |
In quartz veins cutting quartzite near alkalic granite and syenite. |
IMA Status: |
Approved IMA 1959 |
Locality: |
From the Baiyun-Obo mine near Pat-t'ou (Baotou in Russian), Inner Mongolia.. Link to MinDat.org Location Data. |
Name Origin: |
For the locality. |
Synonym: |
ICSD 27759 |
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PDF 39-390 |
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Baotite Image |
Images:
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Images:
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Baotite
Comments: Brown masses of crystalline baotite in white quartz matrix.
Location: Inner Mongolia, Autonomous Region, China.
Scale: Picture size 2 cm.
© Tom Loomis / Dakota Matrix |
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Baotite Crystallography
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Axial Ratios: |
a:c = 1:0.29999 |
Cell Dimensions: |
a = 20.02, c = 6.006, Z = 4; V = 2,407.21 Den(Calc)= 4.37 |
Crystal System: |
Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 41/a |
X Ray Diffraction: |
By Intensity(I/Io): 1.3346(1), 2.243(0.9), 3.516(0.9),1.4221(0.25), 3.139(0.1), 1.763(0.095), |
Crystal Structure:
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Nekrasov Yu V , Ponomarev V I , Simonov V I , Kheiker D M , Soviet Physics - Crystallography , 14 (1969) p.508-514, Refinement of the atomic structure of baotite, and the isomorphic relationships in this mineral
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Physical Properties of Baotite
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Cleavage: |
[110] Good |
Color: |
Light brown, Black. |
Density: |
4.42 - 4.72, Average = 4.57 |
Diaphaniety: |
Transparent to Translucent |
Fracture: |
Hackly - Jagged, torn surfaces, (e.g. fractured metals). |
Habit: |
Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape. |
Hardness: |
6 - Orthoclase |
Luster: |
Vitreous (Glassy) |
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Optical Properties of Baotite
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Dichroism (e): |
colorless or colorless. |
Dichroism (w): |
dark brownish green or light greenish yellow. |
Gladstone-Dale: |
CI meas= 0.039 (Good) - where the CI = (1-KPDmeas/KC) CI calc= -0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2403,KPDmeas= 0.2298,KC= 0.2392 |
Optical Data: |
Uniaxial (+), w=2.16, e=1.94, bire=0.2200. |
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Calculated Properties of Baotite
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Electron Density: |
relectron=3.98 gm/cc note: rBaotite =4.37 gm/cc. |
Fermion Index |
Fermion Index = 0.08843 Boson Index = 0.91157 |
Photoelectric: |
PEBaotite = 169.88 barns/electron U=PEBaotite x relectron= 675.28 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Baotite is Not Radioactive |
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Baotite Classification
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Dana Class: |
60.1.2.1 (60)Cyclosilicate Four-Membered Rings |
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(60.1)as Titanosilicates |
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(60.1.2)Dana Group |
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60.1.2.1 Baotite Ba4(Ti,Nb)8Si4O28Cl I 41/a 4/m |
Strunz Class: |
VIII/E.08-10 VIII - Silicates |
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VIII/E - Cyklosilicates, quadruplet rings [Si4O11]8- |
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VIII/E.08 - Joaquinite group, Baotite - Orthojoaquinite-(Ce) series |
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VIII/E.08-05 Verplanckite Ba2(Mn,Ti,Fe)2Si2O6(O,OH,Cl,F)2·3(H2O) P 6/mmm 6/m 2/m 2/m |
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VIII/E.08-10 Baotite Ba4(Ti,Nb)8Si4O28Cl I 41/a 4/m |
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VIII/E.08-15 Cerchiaraite! Ba4(Mn,Fe,Al)4Si6(O,OH,Cl)26 I 4/mmm 4/m 2/m 2/m |
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VIII/E.08-20 Titantaramellite Ba4(Ti,Fe,Fe,Mg)4(B2Si8O27)O2ClxX=0TO1,withTi>Fe Pmmn 2/m 2/m 2/m |
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VIII/E.08-30 Taramellite Ba4(Fe,Ti,Fe,Mg)4(B2Si8O27)O2Clx(x=0to1) Pmmn 2/m 2/m 2/m |
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VIII/E.08-40 Nagashimalite Ba4(V,Ti)4Si8B2O27Cl(O,OH)2 Pmmn 2/m 2/m 2/m |
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VIII/E.08-50 Strontiojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2·(H2O) C 2 2 |
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VIII/E.08-60 Strontio-orthojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2·(H2O) Pbcm or Pbc2 Ortho |
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VIII/E.08-70 Bario-orthojoaquinite Fe2(Ba,Sr)4Ti2[Si4O12]O2·(H2O) Ccmm or Ccm2 Ortho |
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VIII/E.08-80 Joaquinite-(Ce) NaFeBa2Ce2(Ti,Nb)2[Si4O12]2O2(OH,F)·(H2O) C 2 2 |
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VIII/E.08-89 Orthojoaquinite-(La)! Ba2Na(La,Ce)2FeTi2Si8O26(OH,O,F)·H2O Ccmm 2/m 2/m 2/m |
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VIII/E.08-90 Orthojoaquinite-(Ce) NaFeBa2Ce2Ti2[Si4O12]2O2(OH)·(H2O) Ccmm or Ccm21 Ortho |
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Other Baotite Information
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References: |
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2) |
See Also: |
Links to other databases for Baotite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - Crocoite.com Mineral Locations
4 - EUROmin Project
5 -Google Images
6 -Google Scholar
7 -Handbook of Mineralogy (MinSocAm)
8 -Handbook of Mineralogy (UofA)
9 -MinDAT
10 -MinMax(Deutsch)
11 -MinMax(English)
12 -Mineralienatlas (Deutsch)
13 -QUT Mineral Atlas
14 - WWW-MINCRYST
15 -École des Mines de Paris
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Print or Cut-and-Paste your Baotite Specimen Label here :
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Baotite
Ba4(Ti,Nb)8Si4O28Cl
Dana No: 60.1.2.1 Strunz No: VIII/E.08-10
Locality:
Notes:
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