Characterisation of Ni silicate-bearing minerals by UV–vis–NIR spectroscopy

Do Silicate Minerals Stabilize Ribose as well ?

Ni(O2) complex by anion photoelectron spectroscopy

We report the first anion photoelectron spectroscopic study of nickel monoxide ~NiO!, nickel dioxide ~ONiO!, and nickel-O2 complex, Ni~O2!. The adiabatic electron affinity ~EA! of NiO is measured to be 1.46 ~2! eV. Five low-lying electronic excited states (A P , a D , B F , b S, c P) are observed for NiO at 0.43 ~4!, 0.94 ~4!, 1.24 ~3!, 1.80 ~10!, and 2.38 ~10! eV above the ground state, respec...

The Silica Tetrahedron and the Architecture of Silicate Minerals

With oxygen and silicon comprising approximately 85% of the atoms in Earth’s crust, most minerals in the crust include these two elements, and form the class of minerals called silicates. The basic building block of all silicate minerals is the silica tetrahedron, in which one silicon ion bonds with four oxygen ions. This arrangement of ions (coordination number of 4) is dictated by the ratio o...

Identification of clay minerals by infrared spectroscopy and discriminant analysis.

Identification of clay minerals based on chemometric analysis of measured infrared (IR) spectra was suggested. IR spectra were collected using the diffuse reflection technique. Discriminant analysis and principal component analysis were used as chemometric methods. Four statistical models were created for separation and identification of clay minerals. More than 50 samples of various clay miner...

Towards the wider application of 29 Si NMR spectroscopy to paramagnetic 3 transition metal silicate minerals : copper ( II ) silicates