#Tugtupite is...
#Tenebrescent -It darkens when exposed to UV.
#Fluorescent -It fluoresces under long-, mid-, or shortwave UV.
#Phosphorescent -It GLOWS IN THE DARK!!!!
www.flickr.com/photos/28617...
www.flickr.com/photos/28617...
www.flickr.com/photos/28617...
#MinCup25
Two mineral structures, sodalite on the left and tugupite on the right. Tugupite has beryllium in a tetrahedral site and five-fold coordinated sodium (large grey balls), not four-fold. From: Defects in sodalite‑group minerals determined from X‑ray‑induced luminescence. Adrian A. Finch, Henrik Friis, & Mufeed Maghrabi (2016) Phys Chem Minerals 43:481–491
#Tugtupite is our second sodalite-structure (after #Haüyne). FInch et al. (2016) investigated the sources of color from point defects, bonds, and coordination in the #sodalite cage structure.
Tugupite is different, due to the beryllium substitution by also […]
[Original post on fosstodon.org]
