Alcantarillaite is a recently approved and published new mineral structurally related to walentaite. The mineral is named after its type locality - the Alcantarilla Mine in Cordoba, Spain.

Alcantarillaite occurs mainly as yellow fillings together with scorodite in fissures and cracks in quartz adjacent to löllingite. It forms tiny, lime-yellow rosettes lining vugs and as spheroids of ultrathin blades.

This is a very rich and analysed specimen of this new mineral species.

More information about the new species:

IMA No. 2019-072

Alcantarillaite
[Fe3+0.5(H2O)4][CaAs3+2(Fe3+2.5W6+0.5)(AsO4)2O7]
Alcantarilla mine, Belalcazar, Cordoba, Andalusia, Spain
Rupert Hochleitner, Christian Rewitzer, Ian E. Grey*, Alan
Riboldi-Tunnicliffe, Anthony R. Kampf, Colin M. MacRae,
W. Gus Mumme, Melanie Kaliwoda, Henrik Friis and Carlos
U. Martin

Structurally related to walentaite
Orthorhombic: Imma; structure determined
a = 24.038(8), b = 7.444(3), c = 10.387(3) Å
12.02(100), 6.343(23), 6.025(27), 4.257(17), 3.148(12), 3.016(38),
2.927(11)
Type material is deposited in the collections of the
Mineralogical State Collection, Theresienstrasse 41, 80333
München, Germany, collection number MSM37182 (holotype),
the Natural History Museum, University of Oslo, PO
Box 1172, Blindern, 0318 Oslo, Norway, collection number
KNR44147 (holotype), and the Natural History Museum of
Los Angeles County, 900 Exposition Boulevard, Los Angeles,
CA 90007, USA, catalogue number 73568 (cotype)
How to cite: Hochleitner, R., Rewitzer, C., Grey, I.E.,
Riboldi-Tunnicliffe, A., Kampf, A.R., MacRae, C.M.,
Mumme, W.G., Kaliwoda, M., Friis, H. and Martin, C.U.
(2019) Alcantarillaite, IMA 2019-072. CNMNC Newsletter
No. 52; Mineralogical Magazine, 83