Mineralpedia Details for Miguelromeroite
Miguelromeroite
Named to honor Miguel Romero Sanchez for his documentation and preservation of Mexico’s mineral heritage. It appears as orange-pink prismatic crystals in compact sprays at Mina Ojuela near Mapimi in Durango, Mexico. Additional localities include in Japan at the Gozaisho mine in Honshu Island and in Chile at the Veta Negra mine in Copiapo.
Ref. Kampf, R. and American Mineralogist November-December 2009 v. 94 no. 11-12 p. 1535-1540
- Formula
- Mn5(AsO4)2(AsO3OH)2·4H2O
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Miguelromeroite from Veta Negra mine, Pampa Larga dist., Copiapó, Atacama Prov., Chile
This mineral, original described as Villyaellenite, was found to be a new mineral based on single-crystal structure refinement by Dr. A. R. Kampf. Miguelromeroite was found to be the Mn dominant end member of the Sainfeldite (Ca dominant) - Miguelromeroite series with Villyaellenite as the intermediate (Mn, Ca) member. The type locality is Mina Ojuela in Mapimi, Durango, Mexico. The Veta Negra mine, in which this specimen is from, was found to be the Mn dominant member. The Veta Negra mine is a non-producing mine and is not expected to be mined in the foreseeable future. This specimen has crystals to about 0.75mm.
Micro crystals of this rare arsenate originally thought to be calcium bearing Villyaellenite. Miguelromeroite, described in 2008 and is only a three locality mineral.
