Citation: Dl. Reger et al., Variable-temperature X-ray structural investigation of {Fe[HC(3,5-Me(2)pz)(3)](2)}(BF4)(2) (pz = pyrazolyl ring): Observation of a thermally induced spin state change from all high spin to an equal high spin-low spin mixture, concomitant with the onset of nonmerohedral twinning, INORG CHEM, 40(12), 2001, pp. 2870-2874