The color mechanism of pink spinel from Kuh-i-Lal in the Pamir Mountains of Tajikistan was studied using photoluminescence, mid-infrared, and ultraviolet/visible spectroscopy. This included studying ...

Miners collect spinels from gravel at the end of a long day at Man Sin. Photo by Vincent Pardieu, © GIA. In the spring of 2001, I was studying gemology in Yangon ...

Li–Ni–Mn-O spinel cathode materials operating at ∼5 V vs Li+/Li appear to be very interesting alternatives to Co-containing layered materials in terms of rate capability, energy and power densities, ...