pickeringite

pickeringite

[′pik·riŋ‚īt]
(mineralogy)
MgAl2(SO4)4·22H2O A white or faintly colored mineral composed of hydrous sulfate of magnesium and aluminum, occurring in fibrous masses.
References in periodicals archive ?
Both halotrichite and pickeringite crystallize as post-mining formations in old galleries.
Pickeringite was identified by Bandy (1944) as a post-mining formation in old galleries, together with halotrichite.
Other minor associated minerals include kalinite, mirabilite, alunogen, pickeringite and melanterite.
Associated minerals are: melanterite, pickeringite, potassium alum, jarosite, gypsum, arsenolite, sulphur and some unknown minerals.
Associated minerals are: coskrenite-(Ce), zugshunstite-(Ce), melanterite, halotrichite, pickeringite, apjohnite, epsomite and other hydrated sulfates.
arsenic, arsenopyrite, arsenosulvanite, barite, (*) berndtite, bismuthinite bournonite, calcite, cassiterite, chalcopyrite, chlorargyrite, diaphorite, franckeite, freibergite galena, goethite (iridescent), goslarite, halotrichite, hematite, jamesonite, jarosite, matildite, melanterite, miargyrite, nacrite, (*) ottemannite, phosphophyllite, pickeringite, pyrargyrite, pyrite, pyrostilpnite, quarz, siderite, sideronatrite, siderotil, silver, smitsonite, sphalerite, stannite, stephanite, stibnite, tetrahedrite, valentinite, voltaite, wavellite, wolframite, wurtzite Cerro San Pedro Large orthoclase phenocrysts, often replaced by quartz, chlorite, siderite, etc.
Silky white fibrous masses of manganoan pickeringite were identified as hair salt by their appearance and astringent taste; it forms a solid solution with halotrichite and apjohnite, and is distinguishable with certainty only by analysis.
Fast-growing fibrous masses of halotrichite and pickeringite are common in many of the Cerro Rico adits and drifts.
Fast-growing fibrous masses of pickeringite and halotrichite are common in many of the old workings at Cerro Rico.