General Information:
Chemical Formula:
ThSiO4
Composition:
(Molecular Weight = 324.12 gm)
Thorium 71.59 % Th
Silicon 8.67 % Si
Oxygen 19.74 % O
Empirical Formula:
Th(SiO4)
Environment:
Augite-syenite rocks.
Locality:
Island of Lovo, Norway
Name Origin:
From the presence of the element Thorium, a highly radioactive material.
Physical Properties:
Cleavage:
[110] Poor
Color:
brownish yellow, brownish black, yellow, dark brown, or orange.
Density:
4 - 6.7, Average = 5.35
Diaphaniety:
Subtransparent to subtranslucent
Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Granular - Generally occurs as anhedral to subhedral crystals in matrix., Massive - Granular - Common texture obser ved in granite and other igneous rock.
Hardness:
5 - Apatite
Luminescence:
None.
Luster:
Resinous
Streak:
light brown
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