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They are generally neutral frameworks made up of rigid metal and oxoanion (here phosphate) polyhedrons. Heating these materials excites the transverse (bending) M–O–P vibrations with little expansion of the M–O and P–O bonds. Hence the M–P distance decreases with rising temperature, ...
The wheel analogy was almost literally true, except for the heating or cooling fins Gaby had indicated. There was a hub in the center, and it had a hole which could have taken an axle if Themis had actually been a wagon wheel. Radiating from the hub were six thick spokes which flared ...
The amorphous material is stirred, with heating, in water and ortho-dichlorobenzene; methanol is added after cooling. A crystalline material having a distinct peak at 27.3° is produced. [0016] U.S. Pat. No. 4,882,427 in the names of Enokida, et al., teaches a material having non...
The lack of in-depth analysis on the reservoir characteristics and the paleoenvironmental conditions of the Niutitang Formation in the study area has led to an unclear understanding of its geological background. In this study, core samples from well SZY1
Good agreement was obtained in the unit-cell parameter values between heating and cooling. These results indicate that the o-t phase transition occurs reversibly and continuously at T c = 350 plusmn 2degC. We demonstrate that the present synchrotron X-ray powder diffraction technique is very ...