Phase equilibria and the thermodynamics of coexisting phases in the system iron-lithium-oxygen

Tret’yakov, Yu. D.; Oleynikov, N.N.; Metlin, Yu. G.; Erastova, A.P.

doi:10.1016/0022-4596(72)90028-x

Cited by 8 publications

(3 citation statements)

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“…These formulas resemble the formulas of other known spinel phases LiM 5 O 8 (e.g. LiFe 5 O 8 ,39 i.e. Fe T Li O 0.5 Fe O 1.5 O 4 , LiAl 5 O 8 ,40 i.e.…”

Section: Resultssupporting

confidence: 66%

“…For the octahedral site, the M –O distance is slightly too small ( d ( M –O) calculated = 2.041 Å versus d ( M –O) refinement = 2.028(1) Å), but still in good agreement. Furthermore, the lattice parameter 8.328 Å for the larger spinel phase resembles the lattice parameters observed for cubic LiFe 5 O 8 (HT‐phase) and LiV 5 O 8 ( a = 8.33239 / 8.32521Å).…”

Section: Resultssupporting

confidence: 58%

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On the Existence of LiFeVO₄ – Tales and Imagination

Clemens

Haberkorn

Beck

2011

Zeitschrift anorg allge chemie

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In this paper, we report investigations on the synthesis of LiFeVO4 as well as a reinvestigation of recently published research reports. Starting with compounds containing V4+ and Fe3+ for synthesis showed to be the best way to realize the desired composition. A single phase material could not be prepared, instead, we find a disproportionation of V4+ to V3+ and V5+ and separation of these ions into two different phases, such as Li0.5+Fe(5z–1)/2z3+V0.5z3+O4 and Li(1–0.5z)/(1–z)+Fe(1.5–2.5z)/(1–z)3+V0.5/(1–z)5+O4, with z ≈︁ 0.45. Additionally, XANES / EXAFS measurements were performed to determine the cation oxidation states and coordination.

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“…These formulas resemble the formulas of other known spinel phases LiM 5 O 8 (e.g. LiFe 5 O 8 ,39 i.e. Fe T Li O 0.5 Fe O 1.5 O 4 , LiAl 5 O 8 ,40 i.e.…”

Section: Resultssupporting

confidence: 66%

Section: Resultssupporting

confidence: 58%

On the Existence of LiFeVO₄ – Tales and Imagination

Clemens

Haberkorn

Beck

2011

Zeitschrift anorg allge chemie

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“…The aluminochromite cement clinkers were analyzed using a range of modern physico-chemical analysis techniques including X-ray diffraction, spectroscopy, and electron microscopy [2].…”

Section: Methodsmentioning

confidence: 99%

Hydration mechanism of special‐purpose cements

Shabanova,

Korohodska

2023

ce papers

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During baking of the raw mixture, a weak crystallization of hydraulically inert compounds is observed for these materials, providing a substrate for the growth of hydraulic compound crystals with limited solid solutions. As a result of grinding, cleavage of crystals will occur along the growth steps and intercrystalline boundaries, creating additional mechanical stress concentrators, which provides an increase in hydraulic activity. It appears that the full destruction of solid solutions does not occur, which results in strength enhancement of resulting hardened cement stone. The electron defects can also occur, having the form of deviations from distribution of electric charge corresponding to the regular structure of crystals. Upon hydration of the cements obtained from clinkers, highly basic hydrated newgrowths and active hydroxides are formed. At the same time, some leaching occurs on the surface of hydraulically inert compound resulting in a gelatinous hydroxide. With the lapse of time, gelatinous hydrate newgrowths transform to a crystalline state with decrease of basicity and lattice rearrangement into a more closely packed one. Amorphous hydroxides undergo crystalline aging and form a compactive crystallization frame around the grains of alkaline‐earth hydroaluminates.

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