Alcantarillaite (original) (raw)

A valid IMA mineral species

About AlcantarillaiteHide

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Formula:

[Fe3+0.5(H2O)4][CaAs3+2(Fe3+2.5W6+0.5)(AsO4)2O7]

Specific Gravity:

3.06 (Calculated)

Crystal System:

Orthorhombic

Name:

Named after the Alcantarilla mine, Spain, the type locality.

Structurally related to walentaite. Unique combination of elements.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:54031:9

75aeab39-b7c9-47ba-bd35-e572670bdd53

IMA Classification of AlcantarillaiteHide

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IMA Formula:

[Fe3+0.5(H2O)4][CaAs3+2(Fe3+2.5W6+0.5)(AsO4)2O7]

Type description reference:

Grey, I.E., Hochleitner, R., Rewitzer, C., Riboldi-Tunnicliffe, A., Kampf, A.R., MacRae, C.M., Mumme, W.G., Kaliwoda, M., Friis, H., Martin, C.U. (2020) The walentaite group and the description of a new member, alcantarillaite, from the Alcantarilla mine, Belalcázar, Córdoba, Andalusia, Spain. Mineralogical Magazine: 84: 412-419.

Classification of AlcantarillaiteHide

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8.DM.60

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
M : With large and medium-sized cations, (OH, etc.):RO4 > 2:1

Mineral SymbolsHide

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

Physical Properties of AlcantarillaiteHide

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Fracture:

Irregular/Uneven

Density:

3.06 g/cm3 (Calculated)

Comment:

Calculated based on the empirical formula and single-crystal X-ray diffraction

Optical Data of AlcantarillaiteHide

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RI values:

_n_α = 1.703 _n_β = 1.800(5) _n_γ = 1.850(5)

δ = 0.147

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Dispersion:

r > v, moderate

Comments:

α calculated
X = a, Y = c and Z = b

Chemistry of AlcantarillaiteHide

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Mindat Formula:

[Fe3+0.5(H2O)4][CaAs3+2(Fe3+2.5W6+0.5)(AsO4)2O7]

Crystallography of AlcantarillaiteHide

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Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

Cell Parameters:

a = 24.038(8) Å, b = 7.444(3) Å, c = 10.387(3) Å

Ratio:

a:b:c = 3.229 : 1 : 1.395

Unit Cell V:

1,858.64 ų (Calculated from Unit Cell)

Morphology:

Ultrathin elongated blades, with lengths up to 0.1 mm and thicknesses of only 1–2 μm. The crystals are generally curved and show sub-parallel
lamellae.

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of AlcantarillaiteHide

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General Appearance of Type Material:

lemon-yellow fillings together with massive scorodite in fissures and cracks in quartz adjacent to löllingite. It is also found as tiny yellow rosettes lining vugs and as spheroids of ultrathin blades.

Place of Conservation of Type Material:

collections of the (1) Mineralogical State Collection, Theresienstrasse 41, 80333 München, Germany, collection number MSM37182 (holotype); (2) Natural History Museum, University of Oslo, PO Box 1172, Blindern, 0318 Oslo, Norway, collection number KNR44147 (holotype); (3) Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 73568 (cotype)

Associated Minerals at Type Locality:

Reference:

Grey, I.E., Hochleitner, R., Rewitzer, C., Riboldi-Tunnicliffe, A., Kampf, A.R., MacRae, C.M., Mumme, W.G., Kaliwoda, M., Friis, H., Martin, C.U. (2020) The walentaite group and the description of a new member, alcantarillaite, from the Alcantarilla mine, Belalcázar, Córdoba, Andalusia, Spain. Mineralogical Magazine: 84: 412-419.

Other Language Names for AlcantarillaiteHide

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Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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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 AlcantarillaiteHide

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References for AlcantarillaiteHide

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Reference List:

Grey, I.E., Hochleitner, R., Rewitzer, C., Riboldi-Tunnicliffe, A., Kampf, A.R., MacRae, C.M., Mumme, W.G., Kaliwoda, M., Friis, H., Utrera Martin, C. (2020) The walentaite group and the description of a new member, alcantarillaite, from the Alcantarilla mine, Belalcázar, Córdoba, Andalusia, Spain. Mineralogical Magazine: 84: 412-419.

Grey, I.E., Hochleitner, R., Rewitzer, C., Riboldi-Tunnicliffe, A., Kampf, A.R., MacRae, C.M., Mumme, W.G., Kaliwoda, M., Friis, H., Martin, C.U. (2020) The walentaite group and the description of a new member, alcantarillaite, from the Alcantarilla mine, Belalcázar, Córdoba, Andalusia, Spain. Mineralogical Magazine: 84: 412-419.

Localities for AlcantarillaiteHide

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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

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- 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.