BaMoO

The prepared sample is returned to the combustion tube, and the end caps are secured in place. The temperature controller is set to maintain the desired reaction temperature. A slow stream of an oxygen-free, water-free mixture of argon (85 %) and hydrogen (15%) is allowed to flow continuously through the combustion tube. This mixture of gases can be used without special precautions because it is not flammable or explosive. A reaction temperature of 1000° is used to prepare BaMoOs, and SrMoOa forms at 950°. With a flow rate corresponding to about 100 bubbles/minute, a reaction time of 8-12 hours is required. 

Both BaMoOs and SrXIoOs show metallic conductivity (resistivity increases with increasing temperature) over the temperature range —190 to 180°. 

Barium molybdate BaMoO, 3,54 10- Cesium periodate CslO 5.16 10-5... 

Yam an aka et al [63] have studied meehanieal properties of alkaline-earth perovskites. According to him, the elastic moduli and Debye temperature of BaUOs, BaZrOs, BaCeOs, BaMoOs, SrTiOs, SrZrOs and SrCeOs are corrected to the values for 100% of the theoretical density by using a finite element method, while those of SrMoOs, SrHfOs and SrRuOs are not corrected. It has found that BaZrOs and SrZrOs show the highest Young s modulus in Ba and Sr series perovskites, respectively. It is known that the Debye temperature (0d) can be related... 

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