Mindat Logo

Ankangite

Formula:
Ba(Ti,V
3+
 
,Cr)
 
8
O
 
16
System:TetragonalColour:Black
Hardness:
Name:For the type locality.

Classification of Ankangite

IMA status:Approved
Strunz 8th edition ID:4/D.08-35
Nickel-Strunz 10th (pending) edition ID:4.DK.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
K : With large (+- medium-sized) cations; tunnel structures
Dana 8th edition ID:7.9.4.2

7 : MULTIPLE OXIDES
9 : AB8X16
Hey's CIM Ref.:7.9.29

7 : Oxides and Hydroxides
9 : Oxides of Ti
mindat.org URL:http://www.mindat.org/min-238.html
Please feel free to link to this page.

Type Occurrence of Ankangite

Type Locality:Shiti Ba deposit, Hanbin District, Ankang Prefecture, Shaanxi Province, China
General Appearance of Type Material:Euhedral to subhedral, prismatic crystals to 1 mm
Year of Discovery:1989
Geological Setting of type material:Quartz vein
Associated Minerals at type locality:
RoscoeliteDiopsideBarytocalciteBaryte

Physical Properties of Ankangite

Lustre:Adamantine, Vitreous
Colour:Black
Streak:Greyish black
Hardness (Mohs):
Hardness (Vickers):VHN50=874 kg/mm2
Tenacity:Brittle
Cleavage:None Observed
Interrupts perpendicular to the elongation, possibly a parting
Fracture:Irregular/Uneven
Density (measured):4.44 g/cm3
Density (calculated):4.389 g/cm3

Crystallography of Ankangite

Crystal System:Tetragonal
Class (H-M):4/m - Dipyramidal
Space Group:I4/m
Cell Parameters:a = 10.139Å, c = 2.961Å
Ratio:a:c = 1 : 0.292
Unit Cell Volume:V 304.39 ų (Calculated from Unit Cell)
Z:1
Morphology:Prismatic crystals with {100} and {110}
X-Ray Powder Diffraction:
d-spacingIntensity
3.202 (10)
2.476 (7)
1.589 (7)
3.580 (5)
2.233 (5)
1.892 (5)
Comments:Material from the type locality

Optical Data of Ankangite

Type:Uniaxial
Type:Anisotropic
Anisotropism:Distinct
Bireflectance:Weak to distinct
Colour in reflected light:Light rose-reddish grey
Pleochroism:Weak
Comments:O = pinkish grey, E = light pink, Orientation: E = c

Chemical Properties of Ankangite

Formula:
Ba(Ti,V
3+
 
,Cr)
 
8
O
 
16
Essential elements:Ba, O, Ti
All elements listed in formula:Ba, Cr, O, Ti, V
Analytical Data:Electron microprobe data of material from the type locality; presence of V3+ confirmed by X-ray photoelectron spectroscopy (XPS)
TiO2 (54.09)
V2O3 (22.32)
Cr2O3 (2.08)
BaO (20.59)

sum 99.08 wt.-%
Empirical Formula:
Ba
 
1.09
(Ti
 
5.48
V
 
2.41
Cr
 
0.22
)
 
08.11
O
 
16

Relationship of Ankangite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.DK.05Akaganeite
β-Fe
3+
 
O(OH,Cl)
4.DK.05Coronadite
Pb(Mn,Mn)
 
8
O
 
16
4.DK.05Hollandite
Ba(Mn
4+
 
,Mn
2+
 
)
 
8
O
 
16
4.DK.05Manjiroite
(Na,K)Mn
 
8
O
 
16
·nH
 
2
O
4.DK.05Mannardite
Ba
 
x
Ti
 
8-2x
V
 
2x
O
 
16
·2-xH
 
2
O
4.DK.05Priderite
(K,Ba)(Ti,Fe)
 
8
O
 
16
4.DK.05Redledgeite
Ba
 
x
([Cr,Fe,V]
3+
2x
Ti
 
8-2x
)O
 
16
4.DK.05Henrymeyerite
BaFe
2+
 
Ti
 
7
O
 
16
4.DK.10Cryptomelane
K(Mn
4+
 
,Mn
2+
 
)
 
8
O
 
16
4.DK.10Romanèchite
(Ba,H
 
2
O)
 
2
Mn
 
5
O
 
10
4.DK.10Todorokite
(Ca,K,Na,Mg,Ba,Mn)(Mn,Mg,Al)
 
6
O
 
12
·3H
 
2
O
4.DK.10Strontiomelane
SrMn
4+
6
Mn
3+
2
O
 
16
Related Minerals - Hey's Index Grouping:

- +
7.9.1Hongquiite
TiO
7.9.2Rutile
TiO
 
2
7.9.3Anatase
TiO
 
2
7.9.4Brookite
TiO
 
2
7.9.5Geikielite
MgTiO
 
3
7.9.6Perovskite
CaTiO
 
3
7.9.7Kassite
CaTi
 
2
O
 
4
(OH)
 
2
7.9.8Tausonite
SrTiO
 
3
7.9.9Crichtonite
(Sr,La,Ce,Y)(Ti,Fe
3+
 
,Mn)
 
21
O
 
38
7.9.10Lucasite-(Ce)
CeTi
 
2
(O,OH)
 
6
7.9.11Hibonite
(Ca,Ce)Al
 
12
O
 
19
7.9.12Yttrocrasite-(Y)
(Y,Th,Ca,U)(Ti,Fe)
 
2
(O,OH)
 
6
7.9.13Pyrophanite
Mn
2+
 
TiO
 
3
7.9.14Iwakiite
Mn(Fe,Mn)
 
2
O
 
4
7.9.15Ilmenite
Fe
2+
 
TiO
 
3
7.9.16Pseudobrookite
Fe
 
2
TiO
 
5
7.9.17Ulvöspinel
Fe
 
2
TiO
 
4
7.9.18Pseudorutile
Fe
 
2
Ti
 
3
O
 
9
7.9.19Freudenbergite
Na
 
2
(Ti,Fe)
 
8
O
 
16
7.9.20 Kennedyite
MgFeTi
 
3
O
 
10
7.9.21Armalcolite
(Mg,Fe
2+
 
)Ti
 
2
O
 
5
7.9.22Högbomite
(Mg,Fe)
 
2
(Al,Ti)
 
5
O
 
10
7.9.23Qandilite
(Mg,Fe)
 
2
(Ti,Fe,Al)O
 
4
7.9.24Cafetite
(Ca,Mg)(Fe,Al)
 
2
Ti
 
4
O
 
12
·4H
 
2
O
7.9.25Loveringite
(Ca,Ce)(Ti,Fe,Cr,Mg)
 
21
O
 
38
7.9.26Lindsleyite
(Ba,Sr)(Ti,Zr,Fe,Cr)
 
21
O
 
38
7.9.27Priderite
(K,Ba)(Ti,Fe)
 
8
O
 
16
7.9.28Jeppeite
(K,Ba)
 
2
(Ti,Fe)
 
6
O
 
13
7.9.30Ecandrewsite
(Zn,Fe
2+
 
,Mn
2+
 
)TiO
 
3
7.9.31Landauite
NaMnZn
 
2
(Ti,Fe)
 
6
Ti
 
12
O
 
38

Other Names for Ankangite

Synonyms:
IMA1986-026
Other Languages:
German:Ankangit
Russian:Анкангит
Spanish:Ankangita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Ankangite

Reference List:Xiong Ming, Ma Zhesheng, and Peng Zhizhong (1988): A new mineral - Ankangite. Chinese Science Bulletin [Kexue Tongbao] 33(18), 1401-1404 (in Chinese). - American Mineralogist (1991), 76, 2020 (abstract).

Xiong Ming, Ma Zhesheng, and Peng Zhizhong (1989): A new mineral - ankangite. Chinese Science Bulletin [Kexue Tongbao] 34(7), 592-596 (in Chinese). - American Mineralogist (1992), 77, 1119 (abstract).

Wu, X. J., Li, F. H. and Hashimoto, H. (1990): Electron microscope study of the incommensurately modulated structure of ankangite. Acta Crystallographica 46, 111-117.

Nicheng, S., Zhesheng, M. and Wei, L. (1991): Crystal structure determination of ankangite with one-dimensional incommensurate modulation. Acta Petrolog. Mineral. 10(8), 233-245 (in Chinese with English abstract). - American Mineralogist (1992), 77, 1119 (abstract).

Anthony, J. W., et al. (1997): Handbook of Mineralogy, Vol. 3, 15.

Internet Links for Ankangite

Search Engines:
  • Look for Ankangite on Google
  • Look for Ankangite images on Google
  • External Links:
  • Look for Ankangite on Webmineral
  • Look for Ankangite on Athena Mineralogy
  • Look for Ankangite on Wikipedia
  • Look for Ankangite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Ankangite in the Natural History Museum (London) online catalogue
  • Ankangite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Find Ankangite on www.crystalclassics.co.uk
  • Top quality minerals from Kristalle of California
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Buy fine minerals and gemstones from Pala International
  • Search for - Ankangite - on e-Rocks Mineral Sales & Auctions
  • Fine Minerals from Dan Weinrich Minerals
  • Buy Fine Minerals from mineralsweb.com
  • Edwards Minerals - Fine Specimens
  • rare and unusual minerals mainly crystallized
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Buy Minerals and Crystals from Crystalarium.com
  • The Arkenstone - Fine Minerals
  • Jobs:
  • Mining & Geology Jobs
  • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Ankangite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    China
     
    • Shaanxi Province
      • Ankang Prefecture
        • Hanbin District
    Am Min 76 (1991), 2020
    Italy
     
    • Tuscany
      • Lucca Province
        • Apuan Alps
          • Stazzema
            • Sant'Anna di Stazzema
    Biagioni, C., Orlandi, P., & Pasero, M. (2008). Ankangite from Monte Arsiccio mine. (Apuan Alps, Tuscany): third world occurrence. Plinius, 34, 212.
    Russia
     
    • Eastern-Siberian Region
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
          • Lake Baikal area
            • Slyudyanka (Sludyanka)
    Proceedings of the Russian Mineralogical Society 136(5), 65-75.
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 5th Nov 2009 18:09:33