Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
113 (2000), S. 10723-10732
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
Danburite (CaB2Si2O8) is a naturally occurring borosilicate mineral that is a crystalline analog of borosilicate glass. Using two-dimensional correlation electron spin echo envelope modulation spectroscopy, we determined the structure of the prevalent radiation-induced defect, boron oxygen hole center, in this mineral. The hole is trapped by nonbridging oxygen in a strongly distorted −O3B–O––BO3〈sup ARRANGE="STAGGER"〉− linkage; the precursor of the hole center is a Ca2+ vacancy. These results and computer modeling suggest that in borosilicate glasses, the hole center is the same 〉B–O⋅ radical as in alkali borate glasses. We suggest that a 〉B–O− unit near a cation vacancy is the precursor of hole centers in both types of glasses. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1323960
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