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Friedelite - Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex County, New Jersey, USA
(#:MINS8435)
Rare Friedelite xls with the 'sawtooth' habit up to 1 mm on franklinite/dolomite matrix. Ex Francesco Bedognè coll.
Formula :
Mn
2+
8
[(OH,Cl)
10
/Si
6
O
15
]
System:
monoclinic
Hardness:
4-5
Rarity:
rare
Strunz id:VIII/H.28-70 - SILICATES
Name origin:
Named by Emile Bertrand in 1876 in honor of the noted French chemist and mineralogist, Charles Friedel [12 March 1832 Strasbourg, France – 20 April, 1899 Montauban, France], who was professor of chemistry at the Sorbonne. Friedel developed the Friedel-Crafts alkylation and acylation reactions with James Crafts in 1877, and attempted to make synthetic diamonds. His son Georges Friedel (1865–1933) also became a renowned mineralogist and who is well-known for Friedel Law, which is used in X-ray diffraction calculations.
Specimen weight:32 gr.
Crystal size:Up to 1 mm
Overall size: 48mm x 20 mm x 22 mm
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