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Formula: Nd(PO4)
Anhydrous phosphate of neodymium,
monazite group,
monazite supergroup
Crystal System: Monoclinic
Specific gravity: 5.43 calculated
Hardness: 5 to 5½
Colour: Bright rose-red
Environments
Localities
At Kokšín Hill, Spálené Poříčí, Plzeň-South District, Plzeň Region, Czech Republic, monazite-(Nd) has been found in
volcanic-associated marine chert
(HOM).
At the Marmara bauxite deposit, Megara, West Attica, Attica, Greece, monazite-(Nd) occurs as fine-grained 1 to 3
micron pore fillings, and fissure fillings up to 15 microns in brindleyite
(AM 68.849).
At the type locality, Monte Giove, Vallone del Vannino, Formazza, Verbano-Cusio-Ossola Province, Piedmont, Italy,
monazite-(Nd) occurs as long prismatic crystals, bright rose in colour, in small fissures in
gneiss blocks, or druses of
aplitic to pegmatitic
veins in a schistose gneiss with
abundant white mica. Associated minerals include
allanite group minerals,
bastnäsite, gadolinite,
mica group minerals,
monazite-(Ce), rutile and
xenotime
(Mindat).
Monazite-(Nd) from Monte Giove - Image
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