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@ARTICLE{Mondal:586486,
author = {Mondal, Anshuman and Husband, Rachel and Liermann, H.-P.
and Sanchez-Valle, Carmen},
title = {{E}quation of state of ammonia dihydrate up to 112 {GP}a by
static and dynamic compression experiments in diamond anvil
cells},
journal = {Physical review / B},
volume = {107},
number = {22},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {PUBDB-2023-03914},
pages = {224108},
year = {2023},
abstract = {Understanding the high-pressure behavior of ammonia
hydrates is relevant for modeling the interior of solarand
extrasolar icy bodies. We present here the results of
high-pressure x-ray diffraction studies on ammonia-dihydrate
(ADH) at room temperature (298 K) up to 112 GPa, employing
both static and dynamic compressionexperiments performed in
diamond anvil cells. The derived pressure-volume (P-V)
compression curves arein excellent agreement regardless of
the compression technique. In contrast to early theoretical
predictions,our results indicate the stability of the
disordered molecular alloy (DMA) phase, a body centered
cubic (bcc)structure, and the absence of self-ionization in
the investigated pressure range. By combining the P-V data
fromseven different compression runs, we derive the first
equation of state for ADH-DMA based on the
third-orderBirch-Murnaghan formalism with best-fit
parameters: V$_0$ = 23.96 ± 0.03 (Å$^3$ /molecule), B$_0$
= 9.95 ± 0.14 GPa,and B′$_0$ = 6.59 ± 0.03. The
instantaneous bulk modulus directly derived from the
quasicontinuous compressioncurves displays a smooth increase
upon compression that further supports the absence of
structural transitions.},
cin = {DOOR ; HAS-User / FS-PETRA-D},
ddc = {530},
cid = {I:(DE-H253)HAS-User-20120731 /
I:(DE-H253)FS-PETRA-D-20210408},
pnm = {631 - Matter – Dynamics, Mechanisms and Control
(POF4-631) / 6G3 - PETRA III (DESY) (POF4-6G3) / DFG project
439663827 - Experimentele Studien an Planetaren Eis bei
hohem Druck und hoher Temperatur in der Diamanten
Stempelzelle (439663827)},
pid = {G:(DE-HGF)POF4-631 / G:(DE-HGF)POF4-6G3 /
G:(GEPRIS)439663827},
experiment = {EXP:(DE-H253)P-P02.2-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:001058029800001},
doi = {10.1103/PhysRevB.107.224108},
url = {https://bib-pubdb1.desy.de/record/586486},
}