arseniosiderite

arseniosiderite

[är¦sēn·ē·ō′sid·ə‚rīt]
(mineralogy)
Ca3Fe4(AsO4)4(OH)4· 4H2O A yellowish-brown mineral consisting of a basic iron calcium arsenate and occurring as concretions.
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These include arseniosiderite, bromargyrite, cabalzarite, chalcophyllite, clinoclase, clinotyrolite, cobaltkoritnigite, cornubite, fornacite, geminite, litharge, mottramite, nickellotharmeyerite, novacekite, parnauite, powellite, uvarovite, walentaite, wulfenite, yukonite and zalesiite.
Of these iron arsenates, arseniosiderite is the most common, although it has not been previously reported.
Arseniosiderite appears as brown to golden yellow platy crystals forming the matrix for chlorargyrite and several arsenates.
Frequently it is found with siderite, lavendulan, conichalcite and arseniosiderite.
Associated minerals are: pharmacosiderite, olivenite, conichalcite, jarosite, arseniosiderite, scorodite, malachite, azurite, chlorargyrite, mixite and lavendulan.
Associated minerals on other samples are: Co- and Ni-bearing mawbyite, cobaltlotharmeyerite, galena, arseniosiderite and plumbogummite.
Associated minerals on other samples are: lukrahnite, Ni- and Co-bearing ferrilotharmeyerite, mawbyite, arseniosiderite, zeunerite and barium-pharmacosiderite.
See Andina, Bolsa Mururata 1) Negra, Aceromarca, Chojlla Mutun Cryptomelane, hausmannite, hematite, magnetite (30 billion tons of iron ore), pyrolusite Napa Potassium-alum, sulfur, ulexite Negra Arseniosiderite, pyrolusite Negro Pabellon Cassiterite, hisingerite, (Also called Japo) pyrrhotite, siderite, vivianite Nueva Venecia Columbite, ilmenite (to 3.
Arseniosiderite has recently been found at the Gambatesa mine in fractures in chert, as yellow to brown rosettes up to 2 mm, associated with clinoclase.
Clinoclase has been found as blue crystals up to 3 mm at the Gambatesa mine in association with arseniosiderite in chert fractures.
Associated minerals are: quartz, sursassite, adularia, kutnohorite, tilasite, grischunite, arseniosiderite, tripuhyite, rancieite-takenalite and arsenogoyazite.
Occurrence: At the type locality, the mineral occurs on quartz and associated minerals are: Ba-bearing alumopharmacosiderite, barium-pharmacosiderite, arseniosiderite, zeunerite, olivenite, rooseveltite, Co-bearing mawbyite, Co-dominant tsumcorite, waylandite and scorodite.