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Room-temperature synthesis, hydrothermal recrystallization, and properties of metastable stoichiometric FeSe

, : Room-temperature synthesis, hydrothermal recrystallization, and properties of metastable stoichiometric FeSe. Inorganic Chemistry 51(13): 7370-7376

Room-temperature precipitation from aqueous solutions yields the hitherto unknown metastable stoichiometric iron selenide (ms-FeSe) with tetragonal anti-PbO type structure. Samples with improved crystallinity are obtained by diffusion-controlled precipitation or hydrothermal recrystallization. The relations of ms-FeSe to superconducting β-FeSe(1-x) and other neighbor phases of the iron-selenium system are established by high-temperature X-ray diffraction, DSC/TG/MS (differential scanning calorimetry/thermogravimetry/mass spectroscopy), (57)Fe Mössbauer spectroscopy, magnetization measurements, and transmission electron microscopy. Above 300 °C, ms-FeSe decomposes irreversibly to β-FeSe(1-x) and Fe(7)Se(8). The structural parameters of ms-FeSe (P4/nmm, a = 377.90(1) pm, c = 551.11(3) pm, Z = 2), obtained by Rietveld refinement, differ significantly from literature data for β-FeSe(1-x). The Mössbauer spectrum rules out interstitial iron atoms or additional phases. Magnetization data suggest canted antiferromagnetism below T(N) = 50 K. Stoichiometric non-superconducting ms-FeSe can be regarded as the true "parent" compound for the "11" iron-chalcogenide superconductors and may serve as starting point for new chemical modifications.


PMID: 22716049

DOI: 10.1021/ic300798p

Other references

Ouyang, J.; Zhao, W.; Xu, Y.; Chen, W.; Zhong, S., 2006: Thoracic impact testing of pediatric cadaveric subjects. Background: This study aimed to describe the injury mechanism of children's thorax in frontal impact and provide an injury threshold.Methods: Nine unembalmed cadavers were divided into two groups. A young cohort aged 2 to 4 years (four cadav...

Ciferri, R.; Baldrati, I., 1940: The cultivation of cereals in East Africa. VI. Teff. In Italian East Africa the cultivation of teff as a forage plant is purely accidental and considered not justifiable in the tablelands, where conditions favour the growing of richer forage plants, lucerne in particular.

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Neumeister, R.D., 1965: Training and getting the most from your auxiliary personnel. Dental Survey 41(10): 57-58

Christie, A., 1988: Festschrift in honor of Amos Christie, M.D. Journal of Pediatrics 113(3): 579-612

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