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About DiaoyudaoiteHide

Colourless, light green
7½ - 8
Crystal System:
Named for Diaoyudao Island, the Chinese name for the Senkaku islands.
NOTE: There is strong suspicion that diaoyudaoite, from all its known localities, is an INDUSTRIAL WASTE product (from chromium refining, corundum synthesis, etc.) and not a natural mineral.

Classification of DiaoyudaoiteHide

Approval Year:

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
C : With large and medium-sized cations

11 : Miscellaneous

7 : Oxides and Hydroxides
2 : Oxides of the alkali metals

Physical Properties of DiaoyudaoiteHide

Colourless, light green
7½ - 8 on Mohs scale

Optical Data of DiaoyudaoiteHide

Uniaxial (-)
RI values:
nω = 1.688 nε = 1.663
Max Birefringence:
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of DiaoyudaoiteHide

Common Impurities:

Chemical AnalysisHide

Oxide wt%:
SiO20.1 %
TiO20.1 %
Al2O383.8 %
V2O34.7 %
Mn2O30.2 %
MgO3.9 %
BaO0.1 %
Na2O3.7 %
K2O3.8 %
Total:100.4 %
Sample references:
1Dellagiustaite type locality, Sierra de Comechingones, San Luis Province, ArgentinaFrank K. Mazdab collection sample FKM-202 (highest Na:K ratio material)

Crystallography of DiaoyudaoiteHide

Crystal System:
Cell Parameters:
a = 5.6 Å, c = 22.62 Å
a:c = 1 : 4.039
Unit Cell V:
614.33 ų (Calculated from Unit Cell)

Type Occurrence of DiaoyudaoiteHide

Synonyms of DiaoyudaoiteHide

Other Language Names for DiaoyudaoiteHide

Related Minerals - Nickel-Strunz GroupingHide

4.CC.AllendeiteSc4Zr3O12Trig. 3 : R3
4.CC.15GrossiteCaAl4O7Mon. 2/m : B2/b
4.CC.20ChlormayeniteCa12Al14O32[◻4Cl2]Iso. 4 3m : I4 3d
4.CC.25YafsoaniteCa3Zn3(TeO6)2Iso. m3 (2/m 3)
4.CC.30LatrappiteCa2NbFe3+O6Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30LueshiteNaNbO3Orth. mmm (2/m 2/m 2/m)
4.CC.30PerovskiteCaTiO3Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30BarioperovskiteBaTiO3Orth. mm2 : Amm2
4.CC.30LakargiiteCa(Zr,Sn,Ti)O3Orth. mmm (2/m 2/m 2/m) : Pnma
4.CC.30MegawiteCaSnO3Orth. mmm (2/m 2/m 2/m) : Pban
4.CC.35MacedonitePbTiO3Tet. 4/mmm (4/m 2/m 2/m) : P4/nmm
4.CC.35TausoniteSrTiO3Iso. 4 3m
4.CC.35Isolueshite(Na,La)NbO3Iso. m3m (4/m 3 2/m) : Pm3m
4.CC.40CrichtoniteSr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38Trig. 3 : R3
4.CC.40Davidite-(Ce)(Ce,La)(Y,U,Fe)(Ti,Fe)20(O,OH)38Trig. 3 : R3
4.CC.40Davidite-(Y)(La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical)Trig.
4.CC.40LandauiteNaMnZn2(Ti,Fe)6Ti12O38Trig. 3 : R3
4.CC.40Mathiasite(K, Ba, Sr)(Zr, Fe)(Mg,Fe)2 (Ti,Cr,Fe)18O38Trig.
4.CC.40Dessauite-(Y)(Sr,Pb)(Y,U)(Ti,Fe3+)20O38Trig. 3 : R3
4.CC.40Cleusonite(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38Trig. 3 : R3
4.CC.40Gramaccioliite-(Y)(Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38Trig. 3
4.CC.45HawthorneiteBaMgTi3Cr4Fe2+2Fe3+2O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45Magnetoplumbite(Pb,Mn)(Fe,Mn)12O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45PlumboferritePb2(Fe3+,Mn2+,Mg)11O19Trig. 3 2 : P3 1 2
4.CC.45HaggertyiteBaFe2+4Fe3+2Ti5MgO19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45NežilovitePbZn2Mn4+2Fe3+8O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45Hibonite-(Fe)FeAl12O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.45BarioferriteBaFe3+12O19Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
4.CC.60Mengxianminite (of Huang et al.)(Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

7.2.1Lithiophorite(Al,Li)MnO2(OH)2Trig. 3m (3 2/m) : R3m
7.2.3ManjiroiteNa(Mn4+7Mn3+)O16Tet. 4/m : I4/m
7.2.4CryptomelaneK(Mn4+7Mn3+)O16Mon. 2/m

Other InformationHide

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

References for DiaoyudaoiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Shen Shunxi, Chen Lirong, Li Anchun, Dong Tailu, Huang Qiuhuo, and Xu Wenqiang (1986): Diaoyudaoite - A new mineral. Acta Mineralogica Sinica 6(3), 224-227 (in Chinese with English abstract). - American Mineralogist (1987), 75, 240 (abstract).
Zhu, Naijue; Guo, Fang; Li, Yan; Shen, Shunxi; Chen, Lirong; Li, Anchun. (1992): Study on crystal structure of diaoyudaoite. Huaxue Xuebao 50, 527-32. (in Chinese).
Ye, Ying; Shen, Zhongyue; Shimizu, Masaaki; Shimazaki, Hidehiko (1998): Comparison between metallurgical byproduct beta-NaAl11O17 and diaoyudaoite and discussion on the possible source of diaoyudaoite. Kuangwu Xuebao 18, 97-100. (in Chinese).

Internet Links for DiaoyudaoiteHide

Localities for DiaoyudaoiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • San Luis Province
    • Sierra de Comechingones
Frank K. Mazdab collection
  • Lower Saxony
    • Goslar
      • Clausthal-Zellerfeld
Schnorrer-Köhler, G. (1991): Mineralogische Notizen V. Aufschluss 42, 155-171.
Japan (TL)
  • Okinawa
    • Senkaku Islands (Diaoyudao Islands; Diaoyutai Islands)
Shunxi Shen, Lirong Chen, Anchun Li, Tailu Dong, Qiuhuo Huang, and Wenqiang Xu (1986): Acta Mineralogica Sinica 6(3), 224-227
  • Telemark
    • Nome
      • Fen complex
        • Søve Mines
Dahlgren, S. (2005): Miljøgeologisk undersøkelse av lavradioaktivt slagg fra ferroniobproduksjonen ved Norsk Bergverk på Søve 1956-1965. Regiongeologen for Buskerud, Telemark og Vestfold, Rapport nt 1, 2005. 19-28.
  • Novosibirsk Oblast
Excalibur Mineral specimen (anthropogenic)
  • Massachusetts
    • Hampden Co.
      • Chester
        • Chester Emery Mines
Kevin Downey specimens (confirmed by PXRD by John Attard)
  • New Jersey
    • Essex Co.
      • Newark
Josef Vajdak (analysis by Petr Ondrush & F. Veselovsky, Czech Geol. Survey).
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