Lanthanite is a
radioactive mineral, a carbonate of the
rare earth elements,
lanthanum,
cerium and
neodymium with formula: (La,Ce,Nd)2(CO3)3·8(H2O). It is officially known as three separate minerals lanthanite-Ce, lanthanite-La and lanthanite-Nd based on the dominant rare earth element. Some samples of the mineral may also contain
dysprosium. It is a secondary mineral formed by the weathering of other minerals and occurs as scales or tabular crystals. Originally identified at Bastnas,
Sweden, it has subsequently been found in
Wales,
Quebec and
Vermont.
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General Information:
Chemical Formula:
(Nd,La)2(CO3)3·8(H2O)
Composition:
(Molecular Weight = 609.96 gm)
Lanthanum 11.39 %
LaHydrogen 2.64 %
H Carbon 5.91 %
C Neodymium 35.47 %
NdOxygen 44.59 %
O Empirical Formula:
Nd1.5La0.5CO33·8(H2O)
IMA Status:
Approved IMA 1980
Physical Properties:
Cleavage:
[010] Perfect, [101] Good
Color:
light pink.
Density:
2.81
Diaphaniety:
Transparent
Hardness:
2.5-3 - Finger Nail-Calcite
Luster:
Vitreous - Pearly
Streak:
white
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