noun1
- •
A trigonal-ditrigonal
pyramidal yellow mineral containing calcium,
carbon,
cerium,
chlorine,
hydrogen,
lanthanum,
manganese,
neodymium,
niobium,
oxygen,
potassium, praeseodymium,
silicon,
sodium,
strontium,
titanium,
yttrium,
and zirconium.
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