449 - Fluor-buergerite

ID	449
Mineral	Fluor-buergerite
Location	Coroaci - Valadares - Brazil
Fluorescence	LW-UV: close SW-UV: close
Mindat.org	View Fluor-buergerite information at mindat.org

ID	818
Long ID	1:1:818:7
Formula	`NaFe³⁺₃Al₆(Si₆O₁₈)(BO₃)₃O₃F`
IMA Status	0
Discovery Year	1966
Diapheny	Translucent
Cleavage	on {11_20}
Tenacity	brittle
Colour	Bronze-brown to dark-brown.
Hardness (min)	7.0
Hardness (max)	7.0
Luminescence	Nonfluorescent.
Lustre	Vitreous to oily.
About the name	Named in 1966 by Gaibriel Donnay, C. O. Ingamells, and Brian H. Mason, in honor of Martin Julian Buerger [April 8, 1903 Detroit, Michigan, USA - February 26, 1986 Lincoln, Massachusetts, USA], Professor of Mineralogy at the Massachusetts Institute of Technology and a pioneer of crystal structure analysis. He invented the X-ray precession camera permitting undistorted photography of the reciprocal lattice. He wrote many standard works concerning X-ray crystallography and was the PhD adviser for Harvard University mineralogist Clifford Frondel. It was renamed fluor-buergerite by Henry et al. (2011).
Streak	Light brown.
Crystal System	Trigonal
Cleavage Type	Distinct/Good
Morphology	Columnar trigonal with pyramidal terminations
UV	Not known to fluoresce in UV
key_elements	0
shortcode_ima	Fbu
Group	Tourmaline

Fluor-buergerite