Titre du document / Document title

Fangite, Tl₃AsS₄, a new thallium arsenic sulfosalts from the Mercur Au deposit, Utah, and revised optical data for gillulyite

Auteur(s) / Author(s)

WILSON J. R. ⁽¹⁾ ; SEN GUPTA P. K. ; ROBINSON P. D. ; CRIDDLE A. J. ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Weber State univ., dep. geology, Ogden UT 84408, ETATS-UNIS

Résumé / Abstract

Fangite is decribed on the basis of one specimen found in a sulfide ore stockpile at the mine. It occurs in a vug with pyrite and other sulfide material of complex composition. A single-crystal x-ray diffraction study shows fangite to be orthorhombic, space group Pnma, with unit-cell parameters a=8.894, b=10.855, c=9.079Å, Z=4. The structure was solved by direct methods and refined to a final residual of 0.046. The As atom isin tetrahedral coordination with S, whereas the Tl2 atom is in fivefold coordination with S, producing trigonal dipyramids

Revue / Journal Title

The American mineralogist   ISSN 0003-004X   CODEN AMMIAY 

Source / Source

1993, vol. 78, n^o9-10, pp. 1096-1103 (34 ref.)

Langue / Language

Anglais

Editeur / Publisher

Mineralogical Society of America, Washington, DC, ETATS-UNIS  (1916) (Revue)

Mots-clés anglais / English Keywords

Experimental study ; XRD ; Crystal structure ; Minerals ; Optical properties ; Ternary compounds ; Thallium sulfides ; Arsenic sulfides ; Inorganic compounds ;

Mots-clés français / French Keywords

Etude expérimentale ; XRD ; Structure cristalline ; Minéral ; Propriété optique ; Composé ternaire ; Thallium sulfure ; Arsenic sulfure ; Tl3AsS4 ; As S Tl ; Fangite ; Composé minéral ;

Localisation / Location

INIST-CNRS, Cote INIST : 503, 35400004853504.0220