Mineral description : Formanite-(Y)

Mineral class Oxides : Perovskit pyrochlor columbite group

Chemical formula YTaO₄

Crystal system Tetragonal

Habitus

Cleavage [111] indistinct.

Hardness 5.5 - 6.5

Density 7.03

Color Brownish black to black, subtranslucent to opaque.

Streak Brown.

Luster Metallic to vitreous.

Description

Occurance

Associates

Notes Type locality : Cooglegong, Pilbara region, West Australia, Australia

Locations A rare mineral

This is probably wrong, but NMR lists formanite from Olden, Krokom, Jämtland.
The original reference is just talking about accessorical minerals, it's not been found there.
I will check the original reference and fix it according to that.
Original reference : Mineralogical Magazine 46, sid 217.

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Last changed : 2001-03-31

Mineral class	Oxides : Perovskit pyrochlor columbite group
Chemical formula	YTaO₄
Crystal system	Tetragonal
Habitus
Cleavage	[111] indistinct.
Hardness	5.5 - 6.5
Density	7.03
Color	Brownish black to black, subtranslucent to opaque.
Streak	Brown.
Luster	Metallic to vitreous.
Description
Occurance
Associates
Notes	Type locality : Cooglegong, Pilbara region, West Australia, Australia
Locations	A rare mineral This is probably wrong, but NMR lists formanite from Olden, Krokom, Jämtland. The original reference is just talking about accessorical minerals, it's not been found there. I will check the original reference and fix it according to that. Original reference : Mineralogical Magazine 46, sid 217.