Difference between revisions of "Ludwigite"

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(Imported from https://secure.wikimedia.org/wikipedia/en/w/index.php?title=Ludwigite&oldid=311476654)
 
 
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{{Infobox mineral
 
{{Infobox mineral
| name        = '''Ludwigite'''
+
| name        = Ludwigite
| category    = mineral
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| category    = [[Borate mineral]]s, Ludwigite series
 +
| strunz      = 06.AB.30
 +
| dana        = 24.02.01.01
 
| boxwidth    =
 
| boxwidth    =
 
| boxbgcolor  =
 
| boxbgcolor  =
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| caption    =
 
| caption    =
 
| formula    = Mg<sub>2</sub>Fe<sup>3+</sup>BO<sub>5</sub>
 
| formula    = Mg<sub>2</sub>Fe<sup>3+</sup>BO<sub>5</sub>
| molweight  = 195.26
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| molweight  = 195.26 g/mol
| color      = Dark green, Black, Black green
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| color      = dark green, black, black-green
 
| habit      = Massive - Fibrous - Distinctly fibrous fine-grained forms
 
| habit      = Massive - Fibrous - Distinctly fibrous fine-grained forms
| system      = [[Orthorhombic]] (2/m 2/m 2/m) Space Group: Pbam
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| system      = [[Orthorhombic crystal system|orthorhombic]]  
 +
| symmetry    = 2/m 2/m 2/m
 
| cleavage    = [001] Perfect
 
| cleavage    = [001] Perfect
 
| fracture    = Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
 
| fracture    = Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
| mohs        = 5.5
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| mohs        =
 
| luster      = Silky
 
| luster      = Silky
 
| refractive  =
 
| refractive  =
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| pleochroism =
 
| pleochroism =
 
| streak      = greenish black
 
| streak      = greenish black
| gravity    = 3.7 - 4, Average = 3.85
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| gravity    = 3.7–4
 
| melt        =
 
| melt        =
 
| fusibility  =
 
| fusibility  =
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| solubility  =
 
| solubility  =
 
| diaphaneity =
 
| diaphaneity =
| other      = non-radioactive, non-magnetic, Non-fluorescent.
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| other      =  
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| references  = <ref name="WebMineral">{{WebMineral-ref | name = Ludwigite | url = http://webmineral.com/data/Ludwigite.shtml | accessdate = 2009-12-04}}.</ref><ref name="MinDat">{{MinDat-ref | name = Ludwigite | id = 2454 | accessdate = 2009-12-04}}.</ref><ref>{{citation | last1 = Irwin | first1 = M. B. | last2 = Peterson | first2 = R. C. | year = 1999 | title = The crystal structure of ludwigite | journal = Canadian Mineralogist | volume = 37 | pages = 939–43}}.</ref>
 
}}
 
}}
  
'''Ludwigite ''' is a mineral, a [[magnesium]]-[[iron]] [[borate]] named for [[Ernst Ludwig (chemist)|Ernst Ludwig]] (1842-1915), an [[Austria]]n chemist at the [[University of Vienna]].<ref>[http://www.mindat.org/min-2454.html Ludwigite at mindat]</ref>
+
'''Ludwigite ''' is a [[magnesium]][[iron]] [[borate mineral]] named for [[Ernst Ludwig (chemist)|Ernst Ludwig]] (1842–1915), an [[Austria]]n chemist at the [[University of Vienna]].<ref name="WebMineral"/><ref name="MinDat"/>
  
 
==References==
 
==References==
 
{{reflist}}
 
{{reflist}}
 
{{mineral-stub}}
 
  
 
[[Category:Magnesium minerals]]
 
[[Category:Magnesium minerals]]

Latest revision as of 06:48, 4 December 2009

Ludwigite
General
Category Borate minerals, Ludwigite series
Chemical formula Mg2Fe3+BO5
Strunz classification 06.AB.30
Dana classification 24.02.01.01
Crystal symmetry 2/m 2/m 2/m
Identification
Molar mass 195.26 g/mol
Color dark green, black, black-green
Crystal habit Massive - Fibrous - Distinctly fibrous fine-grained forms
Crystal system orthorhombic
Cleavage [001] Perfect
Fracture Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Mohs scale hardness
Luster Silky
Streak greenish black
Specific gravity 3.7–4
Optical properties Biaxial (+), a=1.83-1.85, b=1.83-1.9, g=1.97-2.03
References [1][2][3]

Ludwigite is a magnesiumiron borate mineral named for Ernst Ludwig (1842–1915), an Austrian chemist at the University of Vienna.[1][2]

References

  1. 1.0 1.1 Ludwigite, <http://webmineral.com/data/Ludwigite.shtml> (accessed 4 December 2009), WebMineral.com.
  2. 2.0 2.1 Ludwigite, <http://www.mindat.org/show.php?id=2454> (accessed 4 December 2009), MinDat.org.
  3. Irwin, M. B.; Peterson, R. C. The crystal structure of ludwigite. Canadian Mineralogist 1999, 37, 939–43.
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