Sharma, Surinder M. ; Garg, Nandini ; Sikka, S. K. (2000) High-pressure X-ray-diffraction study of α-AlPO4 Physical Review B: Condensed Matter and Materials Physics, 62 (13). pp. 8824-8827. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v62/i13/p8824_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.62.8824
Abstract
Our high-pressure X-ray diffraction experiments on berlinite AlPO4(α-AlPO4) show that it transforms to a crystalline Cmcm phase beyond 13 GPa. The persistence of diffraction pattern up to 40 GPa does not confirm the previous conclusions of high-pressure amorphization of AlPO4 around 12-18 GPa. Our experimental results, in agreement with earlier Raman scattering results, suggest that the so called memory glass effect observed earlier may in fact be due to the reversibility of α-phase Cmcm phase transformation. These new experimental observations raise serious doubts about the theoretical understanding of the high-pressure behavior of α-AlPO4.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 48141 |
| Deposited On: | 13 Jul 2011 14:23 |
| Last Modified: | 12 Jul 2012 07:52 |
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