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Attikaite

A valid IMA mineral species
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About AttikaiteHide

Formula:
Ca3Cu2Al2(AsO4)4(OH)4 · 2H2O
Colour:
light blue, greenish blue
Hardness:
2½ - 3
Specific Gravity:
3.2
Crystal System:
Orthorhombic
Name:
Named for the old Greek region of Attika and the Attiki Prefecture, respectively, in which the Lavrion District is situated.
Note on the type locality: Chukanov et al. (2007) give "Christiana 132" in their original description, but the type locality is in fact only nine metres from the shaft of the Isabelle mine (Branko Rieck, in https://www.mindat.org/mesg-570724.html ). The wrong entry in the publication is probably because of a mis-communication between the finder and the scientists.


Unique IdentifiersHide

Mindat ID:
30778
Long-form identifier:
mindat:1:1:30778:7
GUID
(UUID V4):
8555573a-723d-4ffb-b3cc-7a63fcda2be4

IMA Classification of AttikaiteHide

Approved
Approval year:
2006

Classification of AttikaiteHide

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
42.9.10.

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
AtkIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of AttikaiteHide

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

Optical Data of AttikaiteHide

Type:
Biaxial (-)
RI values:
nα = 1.642(2) nβ = 1.644(2) nγ = 1.644(2)
2V:
Measured: 10° (8)
Max Birefringence:
δ = 0.002
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemistry of AttikaiteHide

Mindat Formula:
Ca3Cu2Al2(AsO4)4(OH)4 · 2H2O

Crystallography of AttikaiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pban
Cell Parameters:
a = 10.01(1) Å, b = 8.199(5) Å, c = 22.78(1) Å
Ratio:
a:b:c = 1.221 : 1 : 2.778
Unit Cell V:
1,869.60 ų (Calculated from Unit Cell)
Morphology:
Spheroidal segregations (up to 0.3 mm in diameter) consisting of thin flexible crystals up to 3 x 20 x 80 μm in size.
Comment:
Space group Pban, Pbam or Pba2.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
22.8 Å(100)
11.36 Å(60)
5.01 Å(90)
2.780 Å(70)
2.682 Å(30)
2.503 Å(50)
2.292 Å(20)

Geological EnvironmentHide

Paragenetic Mode(s):

Type Occurrence of AttikaiteHide

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:

Synonyms of AttikaiteHide

Other Language Names for AttikaiteHide

German:Attikait

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Attikaite associated with RichelsdorfiteCa2Cu5Sb(AsO4)4(OH)6Cl · 6H2O
1 photo of Attikaite associated with OliveniteCu2(AsO4)(OH)
1 photo of Attikaite associated with PharmacosideriteKFe3+4(AsO4)3(OH)4 · 6-7H2O

Related Minerals - Strunz-mindat GroupingHide

8.DJ.05JohnwalkiteK(Mn2+,Fe2+,Fe3+)2(Nb5+,Ta5+)(PO4)2O2 · 2(H2O,OH)Orth. mm2
8.DJ.05OlmsteaditeKFe2+2(Nb5+,Ta5+)(PO4)2O2 · 2H2OOrth. mm2
8.DJ.10GatumbaiteCaAl2(PO4)2(OH)2 · H2OMon. 2/m : P2/m
8.DJ.15CamgasiteCaMg(AsO4)(OH) · 5H2OMon. 2/m : P21/m
8.DJ.20Phosphofibrite(H2O,K)3.5Fe8(PO4)6(OH)7 · 5H2OMon. 2/m
8.DJ.20Meurigite-KKFe3+8(PO4)6(OH)7 · 6.5H2OMon. 2/m : B2/b
8.DJ.20Meurigite-NaNaFe3+8(PO4)6(OH)7 · 6.5H2OMon. 2/m : B2/b
8.DJ.25JungiteCa2Zn4Fe3+8(PO4)9(OH)9 · 16H2OOrth.
8.DJ.30WycheproofiteNaAlZr(PO4)2(OH) · H2OTric. 1 : P1
8.DJ.35ErcititeNa2Mn3+2(PO4)2(OH)2 · 4H2OOrth. mmm (2/m 2/m 2/m) : Cmca
8.DJ.40MrázekiteBi2Cu3(PO4)2O2(OH)2 · H2OMon. 2/m
8.DJ.50MengeiteBa(Mg,Mn2+)Mn3+4(PO4)4(OH)4 · 4H2OTric. 1 : P1

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.

Internet Links for AttikaiteHide

References for AttikaiteHide

Localities for AttikaiteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion Mining District
          • Agios Konstantinos (Kamariza)
            • Kamariza mines (Kamareza mines)
Chukanov et al. (2007)
            • Mercati mines
ZRMO 136 (2)
N. V. Chukanov (2007)
Spain
 
  • Valencian Community
    • Castellón
Mineralogía de la concesión San Rafael
        • San Rafael claim
issuu.com (n.d.) +1 other reference
 
Mineral and/or Locality  
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