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nf. brookite (Mineral)

(n.)
A mineral consisting of titanic oxide, and hence identical with rutile and octahedrite in composition, but crystallizing in the orthorhombic system.
  

General Information:
 Chemical Formula:
TiO2
 Composition:
(Molecular Weight = 79.88 gm)
Titanium 59.94 % Ti
Oxygen 40.06 % O 
 Empirical Formula:
TiO2
 Locality:
Magnet Cove near Hot Springs, Arkansas, USA.
 Name Origin:
Named after the English mineralogist, Henry James Brucke (1771-1857), a London mineralogist and wool trader.
Physical Properties:
 Cleavage:
[120] Indistinct
 Color:
brown, light brown, dark brown, dark reddish brown, or orange.
 Density:
4.1 - 4.14, Average = 4.11
 Diaphaniety:
Transparent to translucent to opaque
 Habits:
Tabular - Form dimensions are thin in one direction., Platy - Sheet forms (e.g. micas).,
 Hardness:
5.5-6 - Knife Blade-Orthoclase
 Luminescence:
None.
 Luster:
Sub Metallic
 Streak:
yellowish white
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B: (Kimia) brukit

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