"The chromium site in doped glassy lithium tetraborate" (2014). Peter Dowben Publications. Paper 261. h i g h l i g h t s g r a p h i c a l a b s t r a c t Adoption of the Li þ site for chromium dopants in lithium tetraborate identified. Increased oxygen coordination for glass over the crystalline lithium tetraborate. Distortions about the doping chromium… (More)
We review the pyroelectric properties and electronic structure of Li 2 B 4 O 7 (110) and Li 2 B 4 O 7 (100) surfaces. There is evidence for a pyroelectric current along the  direction of stoichiometric Li 2 B 4 O 7 so that the pyroelectric coefficient is nonzero but roughly 10 3 smaller than along the  direction of spontaneous polarization. Abrupt… (More)
The four dopants (Nd, Gd, Dy, and Er) substitutionally occupy the Li + sites in lithium tetraborate (Li 2 B 4 O 7 : RE) glasses as determined by analysis of the extended X-ray absorption fine structure. The dopants are coordinated by 6-8 oxygen at a distance of 2.3 to 2.5 Å, depending on the rare earth. The inverse relationship between the RE-O coordination… (More)
Reversible Mn segregation at the polar surface of lithium tetraborate" (2013). Peter Dowben Publications. Paper 256.