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Diaoyudaoite

Big Photo

Novosibirsk, Novosibirsk Oblast', Western-Siberian Region, Russia
© 2007, JGW

Formula:
NaAl
 
11
O
 
17
System:HexagonalColour:Colourless, light green
Lustre:VitreousHardness: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

IMA status:Approved 1985
Explanation of status:Perhaps an industrial waste product dumped into the ocean and not a true mineral.
Strunz 8th edition ID:4/B.08-10
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:7.11.12.1

7 : MULTIPLE OXIDES
11 : Miscellaneous
Hey's CIM Ref.:7.2.2

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

Type Locality:Senkaku Islands (Diaoyudao Islands; Diaoyutai Islands), Okinawa Prefecture, Nansei Archipelago, Japan
Year of Discovery:1986
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

Lustre: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
Maximum Birefringence:δ = 0.025

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High

Chemical Properties of Diaoyudaoite

Formula:
NaAl
 
11
O
 
17
Essential elements:Al, Na, O
All elements listed in formula:Al, Na, O
Common Impurities:Cr

Relationship of Diaoyudaoite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.CC.05Chrombismite
Bi
 
16
CrO
 
27
4.CC.10Freudenbergite
Na
 
2
(Ti,Fe)
 
8
O
 
16
4.CC.15Grossite
CaAl
 
4
O
 
7
4.CC.20Mayenite
Ca
 
12
Al
 
14
O
 
33
4.CC.25Yafsoanite
Ca
 
3
Zn
 
3
[TeO
 
6
]
 
2
4.CC.30Latrappite
(Ca,Na)(Nb,Ti,Fe)O
 
3
4.CC.30Lueshite
NaNbO
 
3
4.CC.30Natroniobite
NaNbO
 
3
4.CC.30Perovskite
CaTiO
 
3
4.CC.30Barioperovskite
BaTiO
 
3
4.CC.30Lakargiite
Ca(Zr,Sn,Ti)O
 
3
4.CC.35Loparite-(Ce)
(Na,Ce,Ca,Sr,Th)(Ti,Nb,Fe)O
 
3
4.CC.35Macedonite
PbTiO
 
3
4.CC.35Tausonite
SrTiO
 
3
4.CC.35Isolueshite
(Na,La,Ca)(Nb,Ti)O
 
3
4.CC.40Crichtonite
(Sr,La,Ce,Y)(Ti,Fe
3+
 
,Mn)
 
21
O
 
38
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,Ca,□)(U,Y)(Fe
3+
 
,Mg)
 
2
(Ti,Fe
3+
 
,Cr,]
 
18
O
 
38
4.CC.40Landauite
NaMnZn
 
2
(Ti,Fe)
 
6
Ti
 
12
O
 
38
4.CC.40Lindsleyite
(Ba,Sr)(Ti,Zr,Fe,Cr)
 
21
O
 
38
4.CC.40Loveringite
(Ca,Ce)(Ti,Fe,Cr,Mg)
 
21
O
 
38
4.CC.40Mathiasite
K(Ti,Cr,Fe,Mg,Zr)
 
21
O
 
38
4.CC.40Senaite
Pb(Ti,Fe,Mn)
 
21
O
 
38
4.CC.40Dessauite-(Y)
(Sr,Pb)(Y,U)(Ti,Fe
3+
 
)
 
20
O
 
38
4.CC.40Cleusonite
(Pb,Sr)(U
4+
 
,U
6+
 
)(Fe
2+
 
,Zn)
 
2
(Ti,Fe
2+
 
,Fe
3+
 
)
 
18
(O,OH)
 
38
4.CC.40Gramaccioliite-(Y)
(Pb,Sr)(Y,Mn)Fe
3+
2
(Ti,Fe
3+
 
)
 
18
O
 
38
4.CC.45Hawthorneite
BaMgTi
 
3
Cr
 
4
Fe
 
4
O
 
19
4.CC.45Hibonite
(Ca,Ce)Al
 
12
O
 
19
4.CC.45Lindqvistite
Pb
 
2
(Mg,Fe)Fe
 
16
O
 
27
4.CC.45Magnetoplumbite
(Pb,Mn)(Fe,Mn)
 
12
O
 
19
4.CC.45Plumboferrite
Pb
 
2
Fe
3+
11-x
Mn
2+
x
O
 
19-2x
, x = 1/3
4.CC.45Yimengite
K(Cr,Ti,Fe,Mg)
 
12
O
 
19
4.CC.45Haggertyite
Ba[Fe
2+
6
Ti
 
5
Mg]O
 
19
4.CC.45Nežilovite
PbZn
 
2
(Mn
4+
 
,Ti
4+
 
)
 
2
Fe
3+
8
O
 
19
4.CC.45Batiferrite
Ba[Ti
 
2
Fe
3+
8
Fe
2+
2
]O
 
19
4.CC.45IMA2009-027
(Fe,Mg)Al
 
12
O
 
19
4.CC.45IMA2009-030
BaFe
3+
12
O
 
19
4.CC.50Jeppeite
(K,Ba)
 
2
(Ti,Fe)
 
6
O
 
13
4.CC.55Zenzénite
Pb
 
3
(Fe,Mn)
 
4
Mn
 
3
O
 
13
4.CC.60Mengxianminite
(Ca,Na)
 
3
(Fe,Mn)
 
2
Mg
 
2
(Sn,Zn)
 
5
Al
 
8
O
 
29
Related Minerals - Hey's Index Grouping:

- +
7.2.1Lithiophorite
(Al,Li)MnO
 
2
(OH)
 
2
7.2.3Manjiroite
(Na,K)Mn
 
8
O
 
16
·nH
 
2
O
7.2.4Cryptomelane
K(Mn
4+
 
,Mn
2+
 
)
 
8
O
 
16

Other Names for Diaoyudaoite

Synonyms:
IMA1985-005
Other Languages:
German:Diaoyudaoit
Russian:Дяоюдаоит
Spanish:Diaoyudaoita

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 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

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    Localities for Diaoyudaoite

    Hide Locality List
    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.
    Japan
     
    • Nansei Archipelago
      • Okinawa Prefecture
    		Acta Mineral. Sinica (1986) 6, 224-227
    Norway
     
    • Telemark
      • Nome
        • Fen complex
          • Søve Mine
    		S. Dahlgren (2005), pp. 19-28.
    Russia
     
    • Western-Siberian Region
      • Novosibirsk Oblast'
    		Dr. Jeffrey Weissman 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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