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Ankangite

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Formula:
Ba(Ti,V
3+
 
,Cr)
 
8
O
 
16
System:Tetragonal
Name:For the type locality.
A variety of Mannardite

Discredited in 2012 IMA 11-F (H2O-free variety of mannardite).

Classification of Ankangite

IMA status:Discredited 2012
Explanation of status:The mineral ankangite is discredited, since it corresponds to an H2O-free variety of mannardite (IMA 11-F, IMA Newsletter 13, Mineralogical Magazine, June 2012, Vol. 76(3), pp. 817)
Hey's CIM Ref.:7.9.29

7 : Oxides and Hydroxides
9 : Oxides of Ti
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Type Occurrence of Ankangite

Type Locality:Shiti Mine, Hanbin District, Ankang Prefecture, Shaanxi Province, China

Physical Properties of Ankangite

Lustre:Adamantine, Vitreous
Fracture:Irregular/Uneven

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}

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
Simplified for copy/paste:Ba(Ti,V3+,Cr)8O16
Essential elements:Ba, O, Ti
All elements listed in formula:Ba, Cr, O, Ti, V

Relationship of Ankangite to other Species

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
7.9.20Kennedyite
MgFe
3+
2
Ti
 
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,La)(Zr,Fe)(Mg,Fe)
 
2
(Ti,Fe,Cr,Al)
 
18
O
 
38
7.9.26Lindsleyite
(Ba,Sr)(Zr,Ca)(Fe,Mg)
 
2
(Ti,Cr,Fe)
 
18
O
 
38
7.9.27Priderite
K(Ti
4+
7
Fe
3+
 
)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

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  • External Links:
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  • 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.
    Brazil
     
    • Minas Gerais
    Tony Nikischer specimen and analysis; Jaroslav Hyrsl specimens
    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; Biagioni, C., Orlandi, P., & Pasero, M. (2009). Ankangite from the Monte Arsiccio mine (Apuan Alps, Tuscany, Italy): occurrence, crystal structure, and classification problems in cryptomelane group minerals. Periodico di Mineralogia, 78, 3-11.
    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
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