Coefficients of thermal expansion (CTEs) of oriented LSO:Ce using I-2/a setting along axes a, b, and c were measured by push-rod dilatometer in the temperature range of 28-1500 degrees C. Results show that CTE of LSO:Ce in the temperature range 28-1500 degrees C (and also to 2100 degrees C) lies in the range of 5 x 10(-6)degrees C-1-11 x 10(-6)degrees C-1. CTEs of LSO:Ce in axes a, b, and c crystallographic directions are functions of temperature and arranged in decreasing order, showing that the strength of chemical bonds along axes a, b, and c should be arranged in increasing order. (C) 2013 Elsevier B.V. All rights reserved.