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@ARTICLE{Britvin:449035,
author = {Britvin, Sergey and Vereshchagin, Oleg and
Krzhizhanovskaya, Maria and Gorelova, Liudmila and
Pakhomova, Anna and Bykov, Maxim and Shilovskikh, Vladimir
V. and Vlasenko, Natalia S. and Zaitsev, Anatoly N. and
Zolotarev, Andrey A. and Lozhkin, Maksim S. and Nestola,
Fabrizio},
title = {{D}iscovery of terrestrial allabogdanite
$({F}e,{N}i)_{2}{P}$, and the effect of {N}i and {M}o
substitution on the barringerite-allabogdanite high-pressure
transition},
journal = {American mineralogist},
volume = {105},
issn = {1945-3027},
address = {Alexandria, Va.},
publisher = {GeoScienceWorld},
reportid = {PUBDB-2020-03569},
pages = {1-35},
year = {2020},
note = {Paper ahead of print},
abstract = {Minerals formed at high pressures are sensitive indicators
of extreme pressure-temperature conditions that occur in
nature. The discovery of the high-pressure polymorph of
(Fe,Ni)$_2$P, allabogdanite in the surficial pyrometamorphic
rocks of the Hatrurim Formation (the Mottled Zone)
surrounding the Dead Sea basin in Israel is the first
terrestrial occurrence of a mineral previously only found in
iron meteorites. Stepwise annealing experiments demonstrate
that allabogdanite is metastable at ambient pressure and
that it irreversibly transforms into its low-pressure
polymorph, barringerite, upon heating to 850±50°C.
High-pressure high-temperature diamond-anvil cell (DAC)
experiments confirm the results of annealing experiments.
The DAC data indicate that Hatrurim allabogdanite is
metastable below 7.4 GPa, and the low- to high-pressure
phase transition (barringerite→allabogdanite) occurs at
25±3 GPa and 1400±100°C. The observed transition pressure
of Hatrurim allabogdanite is significantly higher than that
of pure synthetic Fe$_2$P (8 GPa), due to partial
substitution of Fe for Ni (4 wt.\%) and Mo (2.5 wt.\%).
Because the influence of substituting impurities on the
conditions of phase transitions can be unexpectedly strong,
our findings confirm that caution should be exercised when
extrapolating data from experiments on synthetic compounds
to natural systems. Based on the discovery of terrestrial
allabogdanite (Fe,Ni)$_2$P coupled with experiments probing
the phase transitions in this natural composition, we
contend that terrestrial allabogdanite formed via
transformation from barringerite and posit potential
scenarios of its formation.},
cin = {DOOR ; HAS-User / FS-PET-D},
ddc = {540},
cid = {I:(DE-H253)HAS-User-20120731 /
I:(DE-H253)FS-PET-D-20190712},
pnm = {6211 - Extreme States of Matter: From Cold Ions to Hot
Plasmas (POF3-621) / 6G3 - PETRA III (POF3-622) /
FS-Proposal: I-20190536 (I-20190536)},
pid = {G:(DE-HGF)POF3-6211 / G:(DE-HGF)POF3-6G3 /
G:(DE-H253)I-20190536},
experiment = {EXP:(DE-H253)P-P02.2-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000673958300009},
doi = {10.2138/am-2021-7621},
url = {https://bib-pubdb1.desy.de/record/449035},
}