%0 Journal Article
%A Britvin, Sergey
%A Vereshchagin, Oleg
%A Krzhizhanovskaya, Maria
%A Gorelova, Liudmila
%A Pakhomova, Anna
%A Bykov, Maxim
%A Shilovskikh, Vladimir V.
%A Vlasenko, Natalia S.
%A Zaitsev, Anatoly N.
%A Zolotarev, Andrey A.
%A Lozhkin, Maksim S.
%A Nestola, Fabrizio
%T Discovery of terrestrial allabogdanite (Fe,Ni)<sub>2</sub>P, and the effect of Ni and Mo substitution on the barringerite-allabogdanite high-pressure transition
%J American mineralogist
%V 105
%@ 1945-3027
%C Alexandria, Va.
%I GeoScienceWorld
%M PUBDB-2020-03569
%P 1-35 
%D 2020
%Z Paper ahead of print
%X 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)<sub>2</sub>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<sub>2</sub>P (8 GPa), due to partial substitution of Fe for Ni (4 wt.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000673958300009
%R 10.2138/am-2021-7621
%U https://bib-pubdb1.desy.de/record/449035