Crystallographic studies of some olivine-related (Ni, Mg)3(PO4)2 solid solutions

Nord, Anders G.; Stefanidis, T.

doi:10.1007/bf01204320

Cited by 14 publications

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“…These results clearly show that the unit cell volume of a NijMe phase is correlated to the degree of Me 2+ substitution, and to the cationic radius. The "regions I" of Ni/Mg and Ni/Co, though, are exceptional, with significantly lower V'/(Z • Ar) values than the average value (~ 150 Â 2 ), suggesting a slight structural anomaly with regard to sarcopside, which has been verified for the phase (Ni 0 73 Mg 0 27 ) 3 (P0 4 ) 2 (Nord and Stefanidis, 1983). A similar anomaly at 1070 Κ is likely to prevail for the "region I" Ni/Co phases, although this has not been verified.…”

Section: Unit Cell Dimensionsmentioning

confidence: 62%

“…Some interatomic distances and angles for the three profile-refined Ni/Mesarcopsides are given in Table 4 Table 5 for the here and earlier studied Ni/Me phases. Results on Ni 3 (P0 4 ) 2 from a single-crystal study (Calvo and Faggiani, 1975) and from a profile-refinement based on X-ray Guinier-Hägg powder diffraction data (Nord and Stefanidis, 1983) are included so that the reader may judge the accuracy of the Rietveld method applied on the sarcopside structure.…”

Section: Discussionmentioning

confidence: 99%

“…Data for some pure A/e 3 (P0 4 ) 2 -sarcopsides are also included. Data for the Ni,Mg-phases have earlier been published (Nord and Stefanidis, 1983) Me ζ β (A) 6(A) cl A) (Nord and Stefanidis, 1983), are plotted versus composition in Figure 2. The Νϊ/Λ/e series will be discussed in order of increasing Me 2 + cation radius, r Me , as reported by Shannon and Prewitt (1969) for an octahedral environment of oxygen atoms (r Ni = 0.70Â).…”

Section: Unit Cell Dimensionsmentioning

confidence: 99%

“…The results for the (Ni t _ z Mg z ) 3 (P0 4 ) 2 series (Nord and Stefanidis, 1983) will be briefly summarized (r Mg = 0.72 Â). There are two monophasic regions, "I" (0 < ζ <0.27) and "II" (0.40 < z< 0.60); between them a small twophase region (see Fig.…”

Section: Unit Cell Dimensionsmentioning

confidence: 99%

“…Abbreviations: V = dV,dz, Ζ = 2, Jr = r Mt -r N¡ . The values for Ni/Mg are taken fromNord and Stefanidis (1983) …”

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confidence: 99%

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Crystallographic studies of olivine-related sarcopside-type solid solutions

Nord¹

1984

Zeitschrift Für Kristallographie - Crystalline Materials

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Solid solutions of Afe 3 (P0 4 ) 2 in Ni 3 (P0 4 ) 2 , with the olivine-related sarcopside structure (P2 1 /a), have been prepared and equilibrated at 1070 Κ (A/e = Mg, Μη, Fe, Co, Cu, or Zn). Accurate unit cell dimensions have been obtained from Guinier-Hägg photographic X-ray diffraction data. The cell volumes of the (Ni 1 _ z A/e i ) 3 (P0 4 ) 2 phases are correlated to the size and amount of Me 2 + . Rietveld full-profile refinements based on neutron powder diffraction data have been utilized to determine the distribution of cations among the two distinct octahedral sites M 1 and M 2. The preference for M 1 over M 2 is Ni 2+ > Co 2+ > Mg 2+ , Zn 2+ > Mn 2+ > > Fe 2+ .The cation distribution results are compared with corresponding results for olivines, orthopyroxenes, and some other oxosalt structures with metaloxygen octahedra similar in size and shape to those in olivine. It is concluded that the Ni 2+ /Me 2+ distributions in these structure types are mainly controlled by crystal field energies, while the size effects are small. Brought to you by | provisional account Unauthenticated Download Date | 7/1/15 11:32 PM A. G. Nord: Olivine-related solid solutions Nu(Si0j2 (Pbnm) *>a Ni 3 D(PO<) 2 (P2i/a)

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Section: Unit Cell Dimensionsmentioning

confidence: 62%

Section: Discussionmentioning

confidence: 99%

Section: Unit Cell Dimensionsmentioning

confidence: 99%

Section: Unit Cell Dimensionsmentioning

confidence: 99%

“…Abbreviations: V = dV,dz, Ζ = 2, Jr = r Mt -r N¡ . The values for Ni/Mg are taken fromNord and Stefanidis (1983) …”

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Crystallographic studies of olivine-related sarcopside-type solid solutions

Nord¹

1984

Zeitschrift Für Kristallographie - Crystalline Materials

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Synthesis, Characterization, Electrochemistry, and In Situ X‐ray Diffraction Investigation of Ni₃(PO₄)₂ as a Negative Electrode Material for Lithium‐Ion Batteries

et al. 2020

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Nickel orthophosphate, Ni 3 (PO 4) 2 , was successfully synthesized using solid-state reaction at 900°C. The effect of the calcination temperature on the material purity was investigated at different temperatures (700-900°C). XRD analysis has shown that Ni 3 (PO 4) 2 crystallizes in a monoclinic system with P2 1 /a space group. The electrochemical performances of carbon-coated Ni 3 (PO 4) 2 were investigated for the first time versus Li + /Li and improved by the optimization of the cutoff voltage, the carbon-coating source, and the binder used. The best performance was delivered when using 0.01 V cutoff voltage, sucrose for C-coating, and carboxymethyl cellulose (CMC) binder. A reversible capacity of 249 mAh g À 1 and a capacity retention around 74-79 % after 90 cycles with a good coulombic efficiency of 98 % were obtained at C/5 current rate. In situ XRD measurements demonstrated the irreversible amorphization of the Ni 3 (PO 4) 2 crystal structure during the first discharge process, confirming that this phosphate exhibits a pure conversion mechanism.

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The formation of phosphoran olivine and stanfieldite from the pyrometamorphic breakdown of apatite in slags from a prehistoric ritual immolation site (Goldbichl, Igls, Tyrol, Austria)

2012

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Crystallographic studies of some olivine-related (Ni, Mg)3(PO4)2 solid solutions

Cited by 14 publications

References 21 publications

Crystallographic studies of olivine-related sarcopside-type solid solutions

Crystallographic studies of olivine-related sarcopside-type solid solutions

Synthesis, Characterization, Electrochemistry, and In Situ X‐ray Diffraction Investigation of Ni₃(PO₄)₂ as a Negative Electrode Material for Lithium‐Ion Batteries

The formation of phosphoran olivine and stanfieldite from the pyrometamorphic breakdown of apatite in slags from a prehistoric ritual immolation site (Goldbichl, Igls, Tyrol, Austria)

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Crystallographic studies of some olivine-related (Ni, Mg)3(PO4)2 solid solutions

Cited by 14 publications

References 21 publications

Crystallographic studies of olivine-related sarcopside-type solid solutions

Crystallographic studies of olivine-related sarcopside-type solid solutions

Synthesis, Characterization, Electrochemistry, and In Situ X‐ray Diffraction Investigation of Ni3(PO4)2 as a Negative Electrode Material for Lithium‐Ion Batteries

The formation of phosphoran olivine and stanfieldite from the pyrometamorphic breakdown of apatite in slags from a prehistoric ritual immolation site (Goldbichl, Igls, Tyrol, Austria)

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Product

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About

Synthesis, Characterization, Electrochemistry, and In Situ X‐ray Diffraction Investigation of Ni₃(PO₄)₂ as a Negative Electrode Material for Lithium‐Ion Batteries