tantalite – מילון אנגלי-אנגלי
Tantalite
The
mineral group
tantalite [(
Fe,
Mn)
Ta2O6] is the primary source of the
chemical element tantalum. It is chemically similar to
columbite, and the two are often grouped together as a semi-singular mineral called
coltan or "columbite-tantalite" in many mineral guides. However, tantalite has a much greater
specific gravity than columbite (8.0+ compared to columbite's 5.2). Iron-rich tantalite is the mineral tantalite-(Fe) or
ferrotantalite and manganese-rich is tantalite-(Mn) or
manganotantalite.
tantalite
Noun
1. a mineral consisting of tantalum oxide of iron and manganese that occurs with niobite or in coarse granite; an ore of tantalum
(hypernym) mineral
(substance-meronym) tantalum, Ta, atomic number 73
Tantalite
(n.)
A heavy mineral of an iron-black color and submetallic luster. It is essentially a tantalate of iron.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter.
About
Ferrocolumbite
General Information:
Chemical Formula:Fe++Nb2O6
Composition:(Molecular Weight = 337.66 gm)
Niobium 55.03 %
NbIron 16.54 %
FeOxygen 28.43 %
O Empirical Formula: Fe2+Nb2O6
Environment:Pegmatites, and alluvial deposits.
Locality:M'buye Mine, Rwanda.
Name Origin:Named after its content of the element niobium, formerly called columbium and the Latin ferrium - "iron."
Physical Properties: Cleavage:[010] Distinct
Color:black or brownish black.
Density:5.3 - 7.3, Average = 6.3
Diaphaniety:Translucent to opaque
Habits:Massive - Granular - Common texture observed in granite and other igneous rock., Striated - Parallel lines on crystal surface or cleavage face.,
Hardness:6 - Orthoclase
Luminescence:Non-fluorescent.
Luster:Sub Metallic
Streak:blackish brown
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TANTALITE
TANTALITE
