montebrasite


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montebrasite

[‚män·tə′brä‚zīt]
(mineralogy)
LiAlPO4(OH) A mineral composed of basic lithium aluminum phosphate; it is isomorphous with amblygonite and natromontebrasite.
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Correia Neves and Lopes Nunes (1968) described montebrasite, fluorapatite, amblygonite, triplite, hureaulite, phosphosiderite, variscite, eosphorite and bermanite from Alto Ligonha pegmatites.
Correia Neves and Lopes Nunes (1968) described phosphosiderite, hureaulite, montebrasite, fluorapatite, amblygonite, triplite, variscite, eosphorite and bermanite from Alto Ligonha pegmatites.
Vein deposition of montebrasite, pyrite, quartz, sphalerite, tourmaline and zircon coexists with replacements of triphylite (usually along cleavages) by heterosite, barbosalite, frondelite, jahnsite, phosphosiderite, rockbridgeite, tavorite and manganese oxides.
The frondelite assemblage consists of residual heterosite, [TABULAR DATA FOR TABLE 1 OMITTED] montebrasite and triphylite enclosed by frondelite; massive replacement of frondelite by cyrilovite, cryptomelane and leucophosphite; and fracture coatings in frondelite of bermanite, cyrilovite, goethite, leucophosphite, lipscombite, mitridatite, moraesite, opal, phosphosiderite, rockbridgeite, variscite and manganese oxides.