Nuclear Magnetic Resonance Studies of B11 in Crystalline Borates

Journal Article · Sun Jan 01 04:00:00 EST 1961 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.1731947· OSTI ID:4835726

Bray, P. J.; Edwards, J. O.; O'Keefe, J. G.; Ross, V. F.; Tatsuzaki, I.

The coordination state of the boron atom in boron compounds may be correlated with the properties of the nuclear magnetic resonance (NMR) signals arising from the boron nuclei. Characteristic resonance line shapes occur when the NMR transitions are perturbed by interactions between the B¹¹ nuclear electrical quadrupole moment and the electric field gradient at the boron site. In polycrystalline borates, boron in trigonal and tetrahedral coordination may be resolved by analysis of first and second-order quadrupolar effects on the NMR transitions. The B¹¹ quadrupole coupling constants were measured for the simple trigonal BO₃ and tetrahedral BO₆ groups. The analysis was extended to include polyborate structures having both trigonal and tetrahedral boron atoms. Results of the NMR study of simple, known bonding configurations are discussed and correlated with measurements of alkali-borate glasses and of miscellaneous borate and mineral compounds.

• Research Organization: Brown Univ., Providence
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-030022
• OSTI ID: 4835726
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 2 Vol. 35; ISSN JCPSA6; ISSN 0021-9606
• Publisher: American Institute of Physics (AIP)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALI METALS
ATOMS
BINDING ENERGY
BORATES
BORON 11
BORON COMPOUNDS
COUPLING
CRYSTALS
ELECTRIC FIELDS
ELECTRIC MOMENTS
GLASS
INTERACTIONS
LATTICES
MEASURED VALUES
MINERALS
NUCLEAR MAGNETIC RESONANCE
NUCLEAR MODELS
QUADRUPOLES
SIGNALS
TRANSIENTS