Cotunnite , Xilingolite , Albite , Grossular Field of view: 17 mm Locality: Ogre-Bogle group of claims (Tedford's group), Victorio District (Gage District), Victorio Mountains, Luna County, New Mexico, USA Description: Micro colorless cotunnite crystals on black xilingolite crystals and associated with white albite and pale brown grossular. The cotunnite and xilingolite have been XRD-EDS analyzed. This specimen was collected 3/11/15 by Robert E. Walstrom from the main dump of the lower shaftt of the mine. This is a reclaimed locality. Photo: Robert E. Walstrom using a Dino-Lite digital plug-in camera. — Photo: Robert Walstrom · Public domain
Xilingolite
A lead-bismuth sulfide — the ordered, lower-symmetry dimorph of lillianite.
Intro adapted from Wikipedia (CC BY-SA).
Xilingolite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Pb₃Bi₂S₆.
It crystallizes in the monoclinic crystal system (space group C2/m). It is a member of the Lillianite structural group.
Key properties: specific gravity 7.08; Gray streak; Metallic luster.
IMA symbol Xil, IMA status: approved, named in 1982.
Found in a skarn-type iron deposit.
It is found associated with Magnetite, sphalerite, pyrrhotite, pyrite, arsenopyrite, chalcopyrite, digenite, bornite, molybdenite, galena, bismuth, bismuthinite.
The name refers to the Xilingola locality in China.