bobierrite


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bobierrite

[′bō·bē·ə‚rīt]
(mineralogy)
Mg3(PO4)2·8H2O A transparent, colorless or white, monoclinic mineral consisting of octahydrated magnesium phosphate.
References in periodicals archive ?
Mineral Identification--Optical observation and XRD analysis of the dark purple to black crystals indicated that the specimens are related to the vivianite group of minerals, such as baricite (a magnesium iron phosphate mineral), bobierrite (a magnesium phosphate), and vivianite.
Qualitative XRD analysis led to identifying a variety of zeolite species, including analcime, as the dominant zeolytic phase, followed by chabazite, natrolite, thomsonite, wairakite, stilbite, stilbite-Ca, phillip-site and stellerite-Na, thomsonite-Ca, chabazite-Ca and chabazite-Na, with minor stellerite, laumontite, levyne, phillipsite-Na, and gyrolite Other secondary minerals associated with zeolites were celadonite (Fe-rich mica), nontronite (Fe-rich smectite), greigeite (iron sulide mineral), koninckite or bobierrite (phosphates), alunite (sulphate), truscottite (silicate), calcite or dolomite, and quartz Nontronite occurred in most samples.
Villiaumite was seen here as rich red, gleaming cleavage faces to several centimeters across, in cabinet-size lumps; kovdorskite was on hand, as palest orange, glassy, wedge-shaped crystals to 1 cm in matrix coverages to 8 cm across; the very rare bobierrite was seen as sprays of pale blue, glassy crystals to 3 cm rising from matrix (these from the world's only significant bobierrite occurrence, the Zheleznyi mine, Kovdor massif, Kola Peninsula); and, front and center at the stand, a huge piece of nepheline/apatite matrix was seen to harbor a sharp, complete crystal of eudialyte fully 8 cm across, rose-red inside but with a thin, opaque brown crust of wadeite.