Baotite Mineral Data

General Baotite Information

Chemical Formula:

Ba4(Ti,Nb)8Si4O28Cl

Composition:

Molecular Weight = 1,582.82 gm

Barium 34.70 % Ba 38.75 % BaO

Titanium 17.54 % Ti 29.27 % TiO₂

Niobium 8.22 % Nb 11.76 % Nb₂O₅

Iron 2.12 % Fe 2.72 % FeO

Silicon 7.10 % Si 15.18 % SiO₂

Chlorine 2.02 % Cl 2.02 % Cl

- % Cl -0.45 % -O=Cl₂

Oxygen 28.30 % O

______ ______

100.00 % 99.24 % = TOTAL OXIDE

Empirical Formula:

Ba₄Ti_5.8Nb_1.4Fe²⁺_0.6Si₄O₂₈Cl_0.9

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.

Name Pronunciation:

Baotite

Synonym:

ICSD 27759

PDF 39-390

Baotite Image

Images:

Baotite Columbite-(Fe)

Comments: Minute brown crystalline grains of baotite in dark ferrocolumbite (columbite-(Fe)).
Location: Sheep Creek, Ravalli County, Montana. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

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

Baotite Crystallography

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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

Physical Properties of Baotite

Cleavage:

{110} Good

Color:

Light brown, Black.

Density:

4.42 - 4.72, Average = 4.57

Diaphaneity:

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)

Optical Properties of Baotite

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
Ncalc = 2.05 - 2.13

Optical Data:

Uniaxial (+), w=2.16, e=1.94, bire=0.2200.

Calculated Properties of Baotite

Electron Density:

Bulk Density (Electron Density)=3.98 gm/cc
note: Specific Gravity of Baotite =4.37 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_Baotite= 169.88 barns/electron
U=PE_Baotite x rElectron Density= 675.28 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Baotite is Not Radioactive

Baotite Classification

Dana Class:

60.01.02.01 (60)Cyclosilicate Four-Membered Rings

(60.01)as Titanosilicates

(60.01.02)Dana Group

60.01.02.01 Baotite Ba4(Ti,Nb)8Si4O28Cl I 4₁/a 4/m

Strunz Class:

09.CE.15 09 - SILICATES (Germanates)

09.C - Cyclosilicates

09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),

09.CE.15 Baotite Ba4(Ti,Nb)8Si4O28Cl I 4₁/a 4/m

Other Baotite Information

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 - 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 Baotite Specimen Label here :

Baotite

Ba4(Ti,Nb)8Si4O28Cl
Dana No: 60.01.02.01 Strunz No: 09.CE.15
Locality:

Notes: