Astromat

This is a measurement of the capacitance vs. T of OREX-800107-104, which transforms by calculation into linear thermal expansion coefficient, alpha(T). The sample is a pressed pellet of material, compressed from a homogenized Bennu sample material. See sample picture for further details. From this measurement the coefficient of linear thermal expansion, alpha is calculated as a function of temperature. The coefficient of linear thermal expansion, alpha is represented as DL = alpha * L0 * DT or alpha = DL / (L0 * DT). Helium pressure in the cryostat was ~ 1 Torr (133 Pa) to thermalize the sample as temperature is decreased at a rate of 0.25 K minute-1.