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Science 20 September 1963:
Vol. 141. no. 3586, pp. 1178 - 1179
DOI: 10.1126/science.141.3586.1178
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Articles

Boron-Oxygen Polyanion in the Crystal Structure of Tunellite

Joan R. Clark 1

1 U.S. Geological Survey, Washington 25

The crystal structure of tunellite, SrO·3B2O3·4H2O, with infinite sheets of composition n[B6O9(OH)2]2-, has cations and water molecules in the spaces within the sheets. Adjacent sheets are held together by hydrogen bonding through the water molecules. The boron-oxygen polyanions provide the first example in hydrated borate crystals of one oxygen linked to three borons.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)