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Attikaite

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Christiana Mine, Kamariza Mines (Kamareza Mines), Agios Konstantinos [St Constantine] (Kamariza), Lavrion District Mines, Lavrion (Laurion; Laurium) District, Attikí (Attica; Attika) Prefecture, Greece
© Stephan Wolfsried

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Formula:
Ca
 
3
Cu
 
2
Al
 
2
[AsO
 
4
]
 
4
(OH)
 
4
 · 2H
 
2
O
System:OrthorhombicColour:light blue, greenish blue
Hardness:2½ - 3
Name:Named for the old Greek region of Attika and the Attiki Prefecture, respectively, in which the Lavrion District is situated.
This page provides mineralogical data about Attikaite.

Classification of Attikaite

IMA status:Approved 2006
Nickel-Strunz 10th (pending) edition ID:8.DJ.45

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
J : With large and medium-sized cations, (OH, etc.):RO4 = 1:1
Dana 8th edition ID:42.9.10.

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
9 : (AB)7(XO4)4Zq·xH2O
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Type Occurrence of Attikaite

Type Locality:Christiana Mine, Kamariza Mines (Kamareza Mines), Agios Konstantinos [St Constantine] (Kamariza), Lavrion District Mines, Lavrion (Laurion; Laurium) District, Attikí (Attica; Attika) Prefecture, Greece
General Appearance of Type Material:sparsely scattered, minute botryoids of pale green aggregates, comprised of submicroscopic, intergrown needles
Place of Conservation of Type Material:Fersman Mineralogical Museum of the Russian Academy of Science, Moscow, Russia, Catalog no. 3435/1.
Associated Minerals at type locality:
QuartzPhilipsborniteOliveniteMalachiteJarosite
GoethiteConichalciteCarminiteBeudantiteAzurite
ArsenogoyaziteArsenocrandalliteAllophane

Physical Properties of Attikaite

Colour:light blue, greenish blue
Streak:pale blue
Hardness (Mohs):2½ - 3
Hardness Data:Measured
Cleavage:Perfect
mica-like on {001}
Density (measured):3.2(2) g/cm3
Comment:by heavy liquids

Crystallography of Attikaite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pban {P2/b 2/a 2/n}
Cell Parameters:a = 10.01Å, b = 8.199Å, c = 22.78Å
Ratio:a:b:c = 1.221 : 1 : 2.778
Unit Cell Volume:V 1,869.60 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
22.8 (100)
11.36 (60)
5.01 (90)
2.780 (70)
2.682 (30)
2.503 (50)

Optical Data of Attikaite

Type:Biaxial (-)
RI values: nα = 1.642(2) nβ = 1.644(2) nγ = 1.644(2)
2V:Measured: 10° (8)
Maximum Birefringence:δ = 0.002

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

Chemical Properties of Attikaite

Formula:
Ca
 
3
Cu
 
2
Al
 
2
[AsO
 
4
]
 
4
(OH)
 
4
 · 2H
 
2
O
Essential elements:Al, As, Ca, Cu, H, O
All elements listed in formula:Al, As, Ca, Cu, H, O

Relationship of Attikaite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.DJ.05Johnwalkite
K(Mn
2+
 
,Fe
2+
 
,Fe
3+
 
)
 
2
(Nb
5+
 
,Ta
5+
 
)[O|PO
 
4
]
 
2
 · 2(H
 
2
O,OH)
8.DJ.05Olmsteadite
KFe
2+
2
(Nb
5+
 
,Ta
5+
 
)[O|PO
 
4
]
 
2
 · 2H
 
2
O
8.DJ.10Gatumbaite
CaAl
 
2
[OH|PO
 
4
]
 
2
 · H
 
2
O
8.DJ.15Camgasite
CaMg[OH|AsO
 
4
] · 5H
 
2
O
8.DJ.20Phosphofibrite
[K
 
<0.5
(H
 
2
O)
 
3
][(Fe
3+
 
,Cu)
 
8
(PO
 
4
)
 
6
(OH)
 
7
(H
 
2
O)
 
4
]
8.DJ.20Meurigite-K
[K(H
 
2
O)
 
2.5
][Fe
3+
8
(PO
 
4
)
 
6
(OH)
 
7
(H
 
2
O)
 
4
]
8.DJ.20Meurigite-Na
[Na(H
 
2
O)
 
2.5
][Fe
3+
8
(PO
 
4
)
 
6
(OH)
 
7
(H
 
2
O)
 
4
]
8.DJ.25Jungite
Ca
 
2
Zn
 
4
Fe
3+
8
[OH|PO
 
4
]
 
9
 · 16H
 
2
O
8.DJ.30Wycheproofite
NaAlZr[OH|PO
 
4
]
 
2
 · H
 
2
O
8.DJ.35Ercitite
Na
 
2
(H
 
2
O)
 
4
[Mn
3+
2
(OH)
 
2
(PO
 
4
)
 
2
]
8.DJ.40Mrázekite
Bi
 
2
Cu
 
3
[O|OH|PO
 
4
]
 
2
 · H
 
2
O

Other Names for Attikaite

Synonyms:
IMA2006-017
Other Languages:
German:Attikait

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 Attikaite

Reference List:Chukanov, N.V., Pekov, I.V., Zadov, A.E. (2007): Attikaite, Ca3Cu2Al2(AsO4)4(OH)4•2H2O, a new mineral. Proceedings of the Russian Mineralogical Society (Zapiski RMO), 136(2), 17-24. [American Mineralogist 94,1076 (2009)(abstract)]

Chukanov, N.V., Pekov, I.V., Zadov, A.E. (2007): Attikaite, Ca3Cu2Al2(AsO4)4(OH)4•2H2O, a new mineral species. Geology of Ore Deposits, 49(8), 720-726. [ENGLISH TRANSLATION]

Internet Links for Attikaite

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    Localities for Attikaite

    (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.
    Greece
     
    • Attikí (Attica; Attika) Prefecture
      • Lavrion (Laurion; Laurium) District
        • Lavrion District Mines
          • Agios Konstantinos [St Constantine] (Kamariza)
            • Kamariza Mines (Kamareza Mines)
    		ZRMO 136(2),17-24(2007)
    Mineral and/or Locality
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