Thermal expansion in lithium manganese oxide spinels Li[LixMn2−x]O4 with 0 ≤ x ≤ 1/3

► The coefficients of thermal expansion in Li[LixMn2−x]O4 with 0 ≤ x ≤ 1/3 are examined. ► The coefficients of thermal expansion in x = 0 are very different between the orthorhombic axes. ► The coefficients of thermal expansion are almost independent on x at x ≥ 0.05.