Anomalous elastic properties of betaine calcium chloride dihydrate, (CH3)3NCH2COO·CaCl2·2H2O
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1434-6036
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| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Physics
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| Notes: |
Abstract The elastic constants of orthorhombic betaine calcium chloride dihydrate have been investigated by ultrasonic methods in the range between 300 and 100 K. The phase transition at 169 K is accompanied by a sharp softening of all ultrasonic waves having longitudinal components of the displacement vector, similar to the effects observed at the α-β transition of Li2Ge7O15 and at the V–IV transition of thiourea. The transition at 129 K shows only very weak anomalies like those found in the α-β transition of Te(OH)6·2NH4H2PO4·(NH4)2HPO4. The transitions at 169 K and 129 K are of second order.
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| Type of Medium: |
Electronic Resource
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| URL: |