Ankangite Mineral Data

Ankangite Mineral Data
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General Ankangite Information

Help on Chemical Formula: Chemical Formula: Ba(Ti,V+++,Cr+++)8O16
Help on Composition: Composition: Molecular Weight = 803.05 gm
   Barium    18.81 %  Ba   21.00 % BaO
   Titanium  32.79 %  Ti   54.71 % TiO2
   Vanadium  15.22 %  V    22.40 % V2O3
   Chromium   1.29 %  Cr    1.89 % Cr2O3
   Oxygen    31.88 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba1.1Ti5.5V3+2.4Cr0.2O16
Help on Environment: Environment: In a quartz vein.
Help on IMA Status: IMA Status: Approved IMA 1989
Help on Locality: Locality: Shiti Barite deposit, Ankang County, Shaanxi Provice, China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Ankangite + Pronunciation Say ANKANGITE
Help on Synonym: Synonym: ICSD 68631
  PDF 41-1427
 

Ankangite Image

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Ankangite

Comments: Black prismatic ankangite inclusions in quartz.
Location: Curvelo region, Minas Gerais, Brazil. Scale: See Image.
© Rruff Database

Ankangite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.29204
Help on Cell Dimensions: Cell Dimensions: a = 10.139, c = 2.961, Z = 1; V = 304.39 Den(Calc)= 4.38
Help on Crystal System: Crystal System: Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 4/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.202(1), 1.589(0.7), 2.476(0.7),
Click Here for Large Ankangite Structure Window Crystal Structure:

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Shi-bin X , Hai-fu F , Xiao-jing W , Fang-hua L , Acta Crystallographica, Section A , 46 (1990) p.929-934, Direct methods in superspace. II The first application to an unknown, incommensurate modulated structure, Note: this is the average structure, isomorphous with hollandite, Note: y-coordinate of O2 altered from .248 to make regular TiO6 polyhedra, Locality: Shiti barite deposit, Ankang County, Shaanxi, China

 

Physical Properties of Ankangite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black.
Help on Density: Density: 4.44
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 6.5 - Pyrite
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: grayish black
 

Optical Properties of Ankangite

Help on Dichroism (e): Dichroism (e): pinkish gray.
Help on Dichroism (w): Dichroism (w): light pink.
Help on Optical Data: Optical Data: Uniaxial (?).
  NCalc= 2.36 - from Gladstone-Dale relationship (KC = 0.3099) where Ncalc=Dcalc*KC+1
NCalc= 2.38 - from Gladstone-Dale relationship (KC = 0.3099) where Ncalc=Dmeas*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Distinct.
Help on RL Bireflectance: RL Bireflectance: Weak to distinct.
Help on RL Color: RL Color: Light rose-reddish gray.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Ankangite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 589 nm   12.80   20.10 
   
Calculated Relative Intensity Colors of Ankangite in Air
Relative
Intensity		    0%   70% 100% 140% 210% 280% 350% 420% 490% 560% 630% 690%
R1                        
R2                        
 

Calculated Properties of Ankangite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.04 gm/cc
note: Specific Gravity of Ankangite =4.38 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PEAnkangite = 90.66 barns/electron
U=PEAnkangite x rElectron Density= 366.50 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ankangite is Not Radioactive
 

Ankangite Classification
Help on Dana Class: Dana Class: 07.09.04.02 (07)Multiple Oxides
  (07.09)Dana Type
  (07.09.04)Dana Group
 
07.09.04.01 Priderite (K,Ba)(Ti,Fe)8O16 I 4/m 4/m
 
07.09.04.02 Ankangite Ba(Ti,V,Cr)8O16 I 4/m 4/m
Help on Strunz Class: Strunz Class: 04.DK.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DK -With large (± medium-sized) cations; tunnel structures
 
04.DK.05 Akaganeite Fe(O,OH,Cl) I2/m 2/m
 
04.DK.05 Ankangite Ba(Ti,V,Cr)8O16 I 4/m 4/m
 
04.DK.05 Coronadite Pb(Mn,Mn)8O16 I2/m 2/m
 
04.DK.05 Hollandite Ba(Mn,Mn)8O16 I2/m 2/m
 
04.DK.05 Manjiroite (Na,K)(Mn,Mn)8O16•n(H2O) I 4/m 4/m
 
04.DK.05 Mannardite BaTi6V2O16•(H2O) I 41/a 4/m
 
04.DK.05 Redledgeite BaTi6Cr2O16•(H2O) I 41/a 4/m
 
04.DK.05 Priderite (K,Ba)(Ti,Fe)8O16 I 4/m 4/m
 
04.DK.05 Henrymeyerite! BaFeTi7O16 I 4/m 4/m
 

Other Ankangite Information
Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(AntBidBlaNic1) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Ankangite :
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 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Ankangite

Ba(Ti,V+++,Cr+++)8O16
Dana No: 07.09.04.02 Strunz No: 04.DK.05
Locality:

 

Notes: