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{| border=1 cellspacing=0 align=right cellpadding=0 width=250 valign=top style="margin-left:1em" |
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|----- align=center bgcolor="#9966FF" |
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!colspan=2 align=center|Jacobsite |
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|----- align=center |
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!colspan=2| |
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|----- align=center bgcolor="#9966FF" |
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!colspan=2|General |
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|----- |
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|Category||[[Mineral]] |
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|----- |
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|[[Chemical name]] || [[iron(II,III) oxide]] |
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|----- |
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|[[Chemical formula]] || |
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|----- align="center" bgcolor="#9966FF" |
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!colspan=2|Identification |
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|----- |
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| Colour || Black |
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|----- |
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| [[Crystal habit]] || |
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|----- |
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| [[Crystal structure|Crystal system]] || Isometric Hexoctahedral |
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|----- |
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| [[Cleavage (crystal)|Cleavage]]|| |
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|----- |
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| [[Fracture]]|| |
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|----- |
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| [[Mohs Scale]] hardness || 5.5 - 6.5 |
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|----- |
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| Luster|| Metallic |
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|----- |
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| [[Refractive index]]|| Opaque |
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|----- |
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| [[Pleochroism]]|| |
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|----- |
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| [[Streak]]|| |
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|----- |
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| [[Specific gravity]]|| 4.75 |
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|----- |
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| [[Fusibility]]|| ? |
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|----- |
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| [[Solubility]]|| ? |
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|----- align="center" bgcolor="#9966FF" |
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!colspan=2|Major varieties |
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|----- |
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'''Jacobsite''' is a [[manganese]] [[iron]] [[oxide]] [[mineral]]. It is a [[magnetite]] and [[spinel]]. |
'''Jacobsite''' is a [[manganese]] [[iron]] [[oxide]] [[mineral]]. It is a [[magnetite]] and [[spinel]]. |
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Jacobsite | |
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General | |
Category | Mineral |
Chemical name | iron(II,III) oxide |
Chemical formula | |
Identification | |
Colour | Black |
Crystal habit | |
Crystal system | Isometric Hexoctahedral |
Cleavage | |
Fracture | |
Mohs Scale hardness | 5.5 - 6.5 |
Luster | Metallic |
Refractive index | Opaque |
Pleochroism | |
Streak | |
Specific gravity | 4.75 |
Fusibility | ? |
Solubility | ? |
Major varieties | |
Jacobsite is a manganese iron oxide mineral. It is a magnetite and spinel.
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