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Ankangite Mineral Data
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General Ankangite Information
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 Chemical Formula: |
Ba(Ti,V+++,Cr+++)8O16 |
| Composition: |
Molecular Weight = 803.05 gm |
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Barium 18.81 % Ba 21.00 % BaO |
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Titanium 32.79 % Ti 54.71 % TiO2 |
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Vanadium 15.22 % V 22.40 % V2O3 |
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Chromium 1.29 % Cr 1.89 % Cr2O3 |
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Oxygen 31.88 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ba1.1Ti5.5V3+2.4Cr0.2O16 |
| Environment: |
In a quartz vein. |
| IMA Status: |
Approved IMA 1989 |
| Locality: |
Shiti Barite deposit, Ankang County, Shaanxi Provice, China. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Ankangite + Pronunciation  |
| Synonym: |
ICSD 68631 |
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PDF 41-1427 |
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Ankangite Image |
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Images:
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Ankangite
Comments: Black prismatic ankangite inclusions in quartz.
Location: Curvelo region, Minas Gerais, Brazil.
Scale: See Image.
© Rruff Database |
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Ankangite Crystallography
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| Axial Ratios: |
a:c = 1:0.29204 |
| Cell Dimensions: |
a = 10.139, c = 2.961, Z = 1; V = 304.39 Den(Calc)= 4.38 |
| Crystal System: |
Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: I 4/m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.202(1), 1.589(0.7), 2.476(0.7), |
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Physical Properties of Ankangite
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| Cleavage: |
None |
| Color: |
Black. |
| Density: |
4.44 |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Uneven - Very brittle fracture producing uneven fragments. |
| Habit: |
Euhedral Crystals - Occurs as well-formed crystals showing good external form. |
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
| Hardness: |
6.5 - Pyrite |
| Luster: |
Vitreous - Adamantine |
| Streak: |
grayish black |
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Optical Properties of Ankangite
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| Dichroism (e): |
pinkish gray. |
| Dichroism (w): |
light pink. |
| Optical Data: |
Uniaxial (?). |
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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
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| RL Anisotrophism: |
Distinct. |
| RL Bireflectance: |
Weak to distinct. |
| RL Color: |
Light rose-reddish gray. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Ankangite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 589 nm |
12.80 |
20.10 |
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Calculated Relative Intensity Colors of Ankangite in Air
Relative
Intensity |
0% |
70% |
100% |
140% |
210% |
280% |
350% |
420% |
490% |
560% |
630% |
690% |
| R1 |
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| R2 |
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Calculated Properties of Ankangite
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| Electron Density: |
Bulk Density (Electron Density)=4.04 gm/cc
note: Specific Gravity of Ankangite =4.38 gm/cc.
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| Fermion Index: |
Fermion Index = 0.07
Boson Index = 0.93 |
| Photoelectric: |
PEAnkangite = 90.66 barns/electron
U=PEAnkangite x rElectron Density= 366.50 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ankangite is Not Radioactive |
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Ankangite Classification
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| Dana Class: |
07.09.04.02 (07)Multiple Oxides |
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(07.09)Dana Type |
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(07.09.04)Dana Group |
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07.09.04.01 Priderite (K,Ba)(Ti,Fe)8O16 I 4/m 4/m |
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07.09.04.02 Ankangite Ba(Ti,V,Cr)8O16 I 4/m 4/m |
| Strunz Class: |
04.DK.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.D - Metal:Oxygen = 1:2 and similar |
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04.DK -With large (� medium-sized) cations; tunnel structures |
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04.DK.05 Akaganeite Fe(O,OH,Cl) I2/m 2/m |
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04.DK.05 Ankangite Ba(Ti,V,Cr)8O16 I 4/m 4/m |
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04.DK.05 Coronadite Pb(Mn,Mn)8O16 I2/m 2/m |
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04.DK.05 Hollandite Ba(Mn,Mn)8O16 I2/m 2/m |
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04.DK.05 Manjiroite (Na,K)(Mn,Mn)8O16•n(H2O) I 4/m 4/m |
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04.DK.05 Mannardite BaTi6V2O16•(H2O) I 41/a 4/m |
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04.DK.05 Redledgeite BaTi6Cr2O16•(H2O) I 41/a 4/m |
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04.DK.05 Priderite (K,Ba)(Ti,Fe)8O16 I 4/m 4/m |
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04.DK.05 Henrymeyerite! BaFeTi7O16 I 4/m 4/m |
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Other Ankangite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(AntBidBlaNic1) OPTIC PROP.(AntBidBlaNic3) |
| 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 - 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
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Ankangite
Ba(Ti,V+++,Cr+++)8O16
Dana No: 07.09.04.02 Strunz No: 04.DK.05
Locality:
Notes:
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