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Ixiolite var. wolframoixiolite

#BAC64006
SOLD
Ixiolite from Zinnwald, Erzgebirge, Bohemia, Czech Republic - BAC64006
Ixiolite from Zinnwald, Erzgebirge, Bohemia, Czech Republic - BAC64006

Ixiolite var. wolframoixiolite

#BAC64006
Availability
Sold
Size
4 x 2.5 x 1.6 cm - Miniature 
Formula
(Ta,Mn,Nb)O2 (RRUFF)
Locality
Zinnwald, Erzgebirge, Bohemia, Czech Republic
Tagged
pegmatite mineral , tantalum , niobium

Black masses of "wolframoixiolite" (Nb,W,Ta,Fe,Mn)2O4, an old name for the variety of Ixiolite containing tungsten. The matrix is Quartz.

Ixiolite

Formula
(Ta,Mn,Nb)O2 
Crystal System
Monoclinic 
Crystal Habit
Prismatic, Irregular Grains 
Cleavage
Indistinct, None, None 
Luster
Metallic 
Color
gray, black, steel gray 
Streak
dark brown 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal - Uneven 
Hardness
6-6.5 

Data courtesy of Webmineral.

Collection
William & Anne Cook Collection
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