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Seamanite



Seamanite
CategoryPhosphate Mineral
Chemical formulaMn3(PO4)B(OH)6
Identification
Molecular Weight372.64 gm
Coloryellow, pink
Crystal habitprismatic
Crystal systemOrthorhombic
Cleavagedistinct on the {001}
FractureBrittle
TenacityBrittle
Mohs Scale hardness4
LusterVitreous
Dispersionrelatively weak
Ultraviolet fluorescenceNone
Streakwhite
Density3.09 g/cm3
DiaphaneityTransparent

Seamanite is a very rare manganese boron phosphate, Mn3(PO4)B(OH)6, first discovered in Michigan under the name "koenigite". The only known occurrences have been Iron and Marquette Counties in Michigan, where it forms brown to pink prismatic crystals. It has been found associated with shigaite.

It is named in honor of late Professor Arthur E. Seaman of Michigan Technological University who discovered it.

References

  • Heinrich, E. W. Mineralogy of Michigan 2nd Ed. (2004)
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Seamanite". A list of authors is available in Wikipedia.
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