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Wadalite

Big Photo

Ettringer Bellerberg Mt., Ettringen, Mayen, Eifel Mts, Rhineland-Palatinate, Germany
© Stephan Wolfsried

Formula:
Ca
 
6
(Al,Mg)
 
4
[Cl
 
3
|O
 
4
|{(Si,Al,Fe
3+
 
)O
 
4
}
 
3
]
System:IsometricColour:Lemon-yellow, ...
Name:Named after Tsunashiro Wada (1856-1920), the first director general of the Geological Survey of Japan.


Garnet Group.

Classification of Wadalite

IMA status:Approved 1993
Strunz 8th edition ID:8/A.08-155
Nickel-Strunz 10th (pending) edition ID:9.AD.25

9 : SILICATES (Germanates)
A : Nesosilicates
D : Nesosilicates without additional anions; cations in [6] and/or greater coordination
Dana 8th edition ID:51.4.5.1

51 : NESOSILICATES Insular SiO4 Groups Only
4 : Insular SiO4 Groups Only with cations in [6] and >[6] coordination
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Type Occurrence of Wadalite

Type Locality:Koriyama, Fukushima Prefecture, Tohoku Region, Honshu Island, Japan
Place of Conservation of Type Material:Geology Museum (Geological Survey of Japan)
Year of Discovery:1987
Geological Setting of type material:calcsilicate xenolith

Physical Properties of Wadalite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Semitransparent
Colour:Lemon-yellow, colourless, grey
Streak:colourless
Density (calculated):3.06 g/cm3

Crystallography of Wadalite

Crystal System:Isometric
Class (H-M):4 3m - Hextetrahedral
Space Group:I4 3d
Cell Parameters:a = 12.014Å
Unit Cell Volume:V 1,734.06 ų (Calculated from Unit Cell)
Z:4

Optical Data of Wadalite

Type:Isotropic
RI values: n = 1.708
Maximum Birefringence:δ = 0.000 - Isotropic minerals have no birefringence
Surface Relief:High

Chemical Properties of Wadalite

Formula:
Ca
 
6
(Al,Mg)
 
4
[Cl
 
3
|O
 
4
|{(Si,Al,Fe
3+
 
)O
 
4
}
 
3
]
Essential elements:Al, Ca, Cl, O, Si
All elements listed in formula:Al, Ca, Cl, Fe, Mg, O, Si
Common Impurities:Mg,Fe

Relationship of Wadalite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.AD.05Larnite
Ca
 
2
[SiO
 
4
]
9.AD.05Calcio-Olivine
Ca
 
2
[SiO
 
4
]
9.AD.15Merwinite
Ca
 
3
Mg[SiO
 
4
]
 
2
9.AD.20Bredigite
Ca
 
7
Mg[SiO
 
4
]
 
4
9.AD.25Andradite
Ca
 
3
Fe
3+
2
[SiO
 
4
]
 
3
9.AD.25Almandine
Fe
2+
3
Al
 
2
[SiO
 
4
]
 
3
9.AD.25Calderite
(Mn
2+
 
,Ca)
 
3
(Fe
3+
 
,Al)
 
2
[SiO
 
4
]
 
3
9.AD.25Goldmanite
Ca
 
3
(V
3+
 
,Al,Fe
3+
 
)
 
2
[SiO
 
4
]
 
3
9.AD.25Grossular
Ca
 
3
Al
 
2
[SiO
 
4
]
 
3
9.AD.25Henritermierite
Ca
 
3
(Mn
3+
 
,Al)
 
2
[(OH)
 
4
|(SiO
 
4
)
 
2
]
9.AD.25Hibschite
Ca
 
3
Al
 
2
[(OH)
 
6-1
|(SiO
 
4
)
 
1.5-2.5
]
9.AD.25Hydroandradite
9.AD.25Katoite
Ca
 
3
Al
 
2
[(OH)
 
8-6
|(SiO
 
4
)
 
1-1.5
]
9.AD.25Kimzeyite
Ca
 
3
(Zr,Ti)
 
2
[(Si,Al,Fe
3+
 
)O
 
4
]
 
3
9.AD.25Knorringite
Mg
 
3
Cr
 
2
[SiO
 
4
]
 
3
9.AD.25Majorite
Mg
 
3
(Fe
2+
 
,Si,Al)
 
2
[SiO
 
4
]
 
3
9.AD.25Morimotoite
Ca
 
3
(Ti,Fe
2+
 
,Fe
3+
 
)
 
2
[(Si,Fe
3+
 
)O
 
4
]
 
3
 (?)
9.AD.25Pyrope
Mg
 
3
Al
 
2
[SiO
 
4
]
 
3
9.AD.25Schorlomite
Ca
 
3
(Ti,Fe
3+
 
)
 
2
[(Si,Fe
3+
 
,Fe
2+
 
)O
 
4
]
 
3
9.AD.25Spessartine
Mn
2+
3
Al
 
2
[SiO
 
4
]
 
3
9.AD.25Uvarovite
Ca
 
3
Cr
 
2
[SiO
 
4
]
 
3
9.AD.25Holtstamite
Ca
 
3
(Al,Mn
3+
 
)
 
2
(SiO
 
4
)
 
2
(OH)
 
4
9.AD.30Coffinite
(U,Th)[(OH)
 
4x
|(SiO
 
4
)
 
1-x
]
9.AD.30Hafnon
(Hf,Zr)[SiO
 
4
]
9.AD.30Thorite
(Th,U)[SiO
 
4
]
9.AD.30Thorogummite
(Th,U)[(OH)
 
4x
|(SiO
 
4
)
 
1-x
]
9.AD.30Zircon
Zr[SiO
 
4
]
9.AD.35Huttonite
Th[SiO
 
4
]
9.AD.35Tombarthite-(Y)
Y
 
4
[HSiO
 
4
]
 
3
9.AD.40Eulytine
Bi
 
4
[SiO
 
4
]
 
3
9.AD.45Reidite
Zr[SiO
 
4
]

Other Names for Wadalite

Synonyms:
IMA1987-045
German names:
Wadalit
Russian names:
Вадалит
Spanish names:
Wadalita

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 Wadalite

Reference List:Feng, Q. L., Glasser, F. P., Howie, R. A., Lachowski, E. E. (1988): Chlorosilicate with the 12CaO.7Al2O3 structure and its relationship to garnet. Acta Crystallogr., C44, 589-92.

Tsukimura, K., Kanazawa, Y., Aoki, M. and Bunno, M. (1993): Structure of wadalite Ca6Al5Si2O16Cl3. Acta Crystallographica, C49, 205-207.

American Mineralogist (1993): 78: 1317.

Glasser, F. P. (1995). Comments on wadalite, Ca6Al5SiO16Cl3, and the structures of garnet, mayenite and calcium chlorosilicate. Addendum. Acta Crystallogr. C51, 340.

Kanazawa, Y., Aoki, M., & Takeda, H. (1997): Wadalite, rustumite, and spurrite from La Negra mine, Queretaro, Mexico. Chishitsu Chosasho Geppo 48, 413-420.

European Journal of Mineralogy (1997): 9: 220.

Fujita, S., Suzuki, K., Ohkawa, M., Shibasaki, Y. & Mori, T. (2001): Reaction of hydrogrossular with hydrogen chloride gas at high temperature. Chemistry of Materials 13, 2523-2527.

T. Mihajlović, C. L. Lengauer, T. Ntaflos, U. Kolitsch and E. Tillmanns (2004): Two new minerals rondorfite, Ca8Mg[SiO4]4Cl2, and almarudite, K(ٱ,Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30], and a study of iron-rich wadalite, Ca12[(Al8Si4Fe2)O32]Cl6, from the Bellerberg (Bellberg) volcano, Eifel, Germany. N. Jahrb. Mineral. Abh. 179, 265-294.

Internet Links for Wadalite

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    Localities for Wadalite

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    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.
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    (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.
    Germany
     
    • Rhineland-Palatinate
      • Eifel Mts
        • Mayen
          • Ettringen
    		T. Mihajlović, C. L. Lengauer, T. Ntaflos, U. Kolitsch and E. Tillmanns (2004): Two new minerals rondorfite, Ca8Mg[SiO4]4Cl2, and almarudite, K(ٱ,Na)2(Mn,Fe,Mg)2(Be,Al)3[Si12O30], and a study of iron-rich wadalite, Ca12[(Al8Si4Fe2)O32]Cl6, from the Bellerberg (Bellberg) volcano, Eifel, Germany. N. Jahrb. Mineral. Abh. 179, 265-294.
    Japan
     
    • Honshu Island
      • Tohoku Region
        • Fukushima Prefecture
    		[Acta Cryst. 49C (1993), 205; EJM 9 (1997), 220; MinRec 32:421]
    Mexico
     
    • Queretaro
      • Mun. de Cadereyta
        • Maconi
    		[MinRec 32:421]
    Russia
     
    • Northern Caucasus Region
      • Kabardino-Balkarian Republic
        • Verkhnechegemskiy volcanic structure
    		A. E. Zadov data
    Mineral and/or Locality
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