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Displacive components of the low-temperature phase transitions in lawsonite
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Hinrich-Wilhelm Meyer
,
Stefan Marion
Published/Copyright:
March 26, 2015
Abstract
The phase transitions in deuterated lawsonite were investigated with high-resolution, time-offlight neutron diffraction between 2 and 500 K. From the analysis of spontaneous strain data, the thermodynamics of the phase transition at 273 K are not changed by the deuteration process. Shifts in atomic positions with temperature indicate continuous changes for a framework oxygen and for one of the deuterium atoms, whereas for the other deuterium atom, a more discontinuous behavior was observed in the average structure. Comparison of O···D and O···O bond lengths with IR data from a non-deuterated lawsonite permits a detailed analysis of assignments of O-H stretching modes
Received: 2000-8-2
Accepted: 2000-11-28
Published Online: 2015-3-26
Published in Print: 2001-4-1
© 2015 by Walter de Gruyter Berlin/Boston
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- In situ atomic force microscopy study of hectorite and nontronite dissolution: Implications for phyllosilicate edge surface structures and dissolution mechanisms
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- The effects of time, temperature, and concentration on Sr2+ exchange in clinoptilolite in aqueous solutions
- Thermodynamics of ion-exchanged and natural clinoptilolite
- Thermochemical study of calcium zeolites–heulandite and stilbite
- Fe3+/ΣFe vs. FeLα peak energy for minerals and glasses: Recent advances with the electron microprobe
- Fibrous nanoinclusions in massive rose quartz: The origin of rose coloration
- Cathodoluminescence study of apatite crystals
- Hydrogen in spessartine-almandine garnets as a tracer of granitic pegmatite evolution
- Ab initio studies of possible fluorine-bearing four- and fivefold coordinated Al species in aluminosilicate glasses
- The nature of radiohaloes in biotite: Experimental studies and modeling
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