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Formula: CaNd(CO3)2F
Anhydrous carbonate, synchysite group,
neodymium-bearing mineral
Specific gravity: 4.14 calculated
Hardness: 4½
Streak: White
Colour: Rose-pink, Pale grey-blue, light grass-green; pale violet to colourless in transmitted light
Environments:
Localities
At the Holičky deposit, Stráž, Česká Lípa District, Liberec Region, Czech Republic, synchysite-(Nd) is an authigenic mineral
occuring as microcavity fillings in sandstone-type
uranium deposits.
Associated minerals include florencite-(La),
sphalerite, manganoan siderite,
pyrite, kaolinite and
chalcedony
(HOM, Dana).
At its type locality, the Grebnik mountain, Klina, District of Peja, Kosovo, synchysite-(Nd) occurs in
limestone at the base of the deposit
(Dana, HOM, AM 64.658).
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