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Diaoyudaoite

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Formula:
NaAl11O17
System:
Hexagonal
Colour:
Colourless, light green
Lustre:
Vitreous
Hardness:
7½ - 8
Name:
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 Diaoyudaoite

Approved 1985
Explanation of status:
Perhaps an industrial waste product dumped into the ocean and not a true mineral.
4.CC.45

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
7.11.12.1

7 : MULTIPLE OXIDES
11 : Miscellaneous
7.2.2

7 : Oxides and Hydroxides
2 : Oxides of the alkali metals
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Type Occurrence of Diaoyudaoite

Year of Discovery:
1985
Geological Setting of Type Material:
Seafloor mud.

Occurrences of Diaoyudaoite

Geological Setting:
Slag piles, waste dumps, and sites of illegal toxic waste dumping.

Physical Properties of Diaoyudaoite

Vitreous
Colour:
Colourless, light green
Hardness (Mohs):
7½ - 8

Crystallography of Diaoyudaoite

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

Optical Data of Diaoyudaoite

Type:
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:
High

Chemical Properties of Diaoyudaoite

Formula:
NaAl11O17
Essential elements:
All elements listed in formula:
Common Impurities:
Cr

Relationship of Diaoyudaoite to other Species

4.CC.05ChrombismiteBi16CrO27
4.CC.10FreudenbergiteNa2(Ti,Fe)8O16
4.CC.15GrossiteCaAl4O7
4.CC.20ChlormayeniteCa12Al14O32Cl2
4.CC.25YafsoaniteCa3Zn3(TeO6)2
4.CC.30Latrappite(Ca,Na)(Nb,Ti,Fe)O3
4.CC.30LueshiteNaNbO3
4.CC.30NatroniobiteNaNbO3
4.CC.30PerovskiteCaTiO3
4.CC.30BarioperovskiteBaTiO3
4.CC.30LakargiiteCa(Zr,Sn,Ti)O3
4.CC.30MegawiteCaSnO3
4.CC.35Loparite-(Ce)(Na,Ce,Ca,Sr,Th)(Ti,Nb,Fe)O3
4.CC.35MacedonitePbTiO3
4.CC.35TausoniteSrTiO3
4.CC.35Isolueshite(Na,La,Ca)(Nb,Ti)O3
4.CC.40Crichtonite(Sr,La,Ce,Y)(Ti,Fe3+,Mn)21O38
4.CC.40Davidite-(Ce)(Ce,La)(Y,U,Fe)(Ti,Fe)20(O,OH)38
4.CC.40Davidite-(La)(La,Ce)(Y,U,Fe)(Ti,Fe)20(O,OH)38
4.CC.40Davidite-(Y)(La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical)
4.CC.40LandauiteNaMnZn2(Ti,Fe)6Ti12O38
4.CC.40Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38
4.CC.40Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38
4.CC.40Mathiasite(K, Ba, Sr)(Zr, Fe)(Mg,Fe)2 (Ti,Cr,Fe)18O38
4.CC.40SenaitePb(Ti,Fe,Mn)21O38
4.CC.40Dessauite-(Y)(Sr,Pb)(Y,U)(Ti,Fe3+)20O38
4.CC.40Cleusonite(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38
4.CC.40Gramaccioliite-(Y)(Pb,Sr)(Y,Mn)Fe23+(Ti,Fe3+)18O38
4.CC.45HawthorneiteBa(MgTi3Cr4Fe4)O19
4.CC.45Hibonite(Ca,Ce)Al12O19
4.CC.45LindqvistitePb2Mn2+Fe16O27
4.CC.45Magnetoplumbite(Pb,Mn)(Fe,Mn)12O19
4.CC.45PlumboferritePb2Fe3+11-xMnx2+O19-2x, x = 1/3
4.CC.45YimengiteK(Cr,Ti,Fe,Mg)12O19
4.CC.45HaggertyiteBa[Fe62+Ti5Mg]O19
4.CC.45NežilovitePbZn2(Mn4+,Ti4+)2Fe83+O19
4.CC.45BatiferriteBa[Ti2Fe83+Fe22+]O19
4.CC.45Hibonite-(Fe)(Fe,Mg)Al12O19
4.CC.45BarioferriteBaFe123+O19
4.CC.50Jeppeite(K,Ba)2(Ti,Fe)6O13
4.CC.55ZenzénitePb3(Fe,Mn)4Mn3O13
4.CC.60Mengxianminite(Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29
7.2.1Lithiophorite(Al,Li)MnO2(OH)2
7.2.3ManjiroiteNa(Mn74+Mn3+)O16
7.2.4CryptomelaneK(Mn74+Mn3+)O16

Other Names for Diaoyudaoite

Name in Other Languages:

Other Information

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 Diaoyudaoite

Reference List:
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 Diaoyudaoite

Localities for Diaoyudaoite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Germany
 
  • Lower Saxony
    • Harz
      • Altenau
Schnorrer-Köhler, G. (1991): Mineralogische Notizen V. Aufschluss 42, 155-171.
Japan (TL)
 
  • Kyushu Region
    • Nansei Archipelago
      • Okinawa Prefecture
        • 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
Norway
 
  • 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.
Russia
 
  • Western-Siberian Region
    • Novosibirsk Oblast'
Excalibur Mineral specimen (anthropogenic)
USA
 
  • 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).
Mineral and/or Locality  
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