Anhydrous lithium borate, Li3B11O18, crystal structure, phase transition and thermal expansion

作者：Sennova Natalia^*; Albert Barbara; Bubnova Rimma; Krzhizhanovskaya Maria; Filatov Stanislav

来源：Zeitschrift fur Kristallographie-Crystalline Materials, 2014, 229(7): 497-504.

DOI：10.1515/zkri-2014-1754

• crystal Structure
• lithium borate
• phase transition
• thermal expansion
• X-ray diffraction

A new lithium borate, Li3B11O18, was synthesized by crystallization from glass, containing an excess of B2O3. The compound crystallizes monoclinic, P2(1)/a, Z=4, a=9.766(5) angstrom, b=7.849(5) angstrom, c=17.899(9) angstrom, beta=100.96(5)degrees, V=1347.0(13) angstrom(3) (R=0.06, wR=0.12). The structure is based upon two interpenetrating frameworks formed by triborate and pentaborate groups. The thermal behaviour of Li3B11O18 was studied using DTA, DSC, and high-temperature XRD. Highly anisotropic thermal expansion and a new high-temperature phase were observed.

• 出版日期2014