Crystal chemistry of γ-(Zn, )3(PO4)2 solid solutions

Nord, Anders G.; Stefanidis, T.

doi:10.1016/0025-5408(81)90288-9

Cited by 20 publications

(11 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, mixed coordination numbers are also found in pure -Zn (PO ) (34). Nord and Kierkegaard (35) showed that two-thirds of the Zn atoms were 5-fold coordinated, in the shape of distorted trigonal bipyramids (36). In -Zn P O , the two highest bond lengths are related to the axial distances Zn1-O7 and Zn2-O2.…”

Section: Discussionmentioning

confidence: 98%

Thermal Behavior of Zinc Phenylphosphonate and Structure Determination ofγ-Zn2P2O7from X-Ray Powder Diffraction Data

Bataille

Bénard-Rocherullé

Louër

1998

Journal of Solid State Chemistry

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 98%

Thermal Behavior of Zinc Phenylphosphonate and Structure Determination ofγ-Zn2P2O7from X-Ray Powder Diffraction Data

Bataille

Bénard-Rocherullé

Louër

1998

Journal of Solid State Chemistry

View full text Add to dashboard Cite

“…Within each Ni ¡Me series, the smallest variation is noted for the monoclinic b axis. This is noteworthy, because in practically all {MEy _ z A/e z ) 3 (P0 4 ) 2 farringtonite and graftonite series, with the same space group symmetry as sarcopside, the largest change with composition was observed for the b axis (Nord and Stefanidis, 1981 ;Nord and Ericsson, 1982). {ME and Me are divalent metals).…”

Section: Unit Cell Dimensionsmentioning

confidence: 90%

“…Within this field I have earlier performed systematic studies involving five-and six-coordinated environments of oxygen atoms (cf. Nord and Stefanidis, 1981 ;Nord and Ericsson, Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

Crystallographic studies of olivine-related sarcopside-type solid solutions

Nord¹

1984

Zeitschrift Für Kristallographie - Crystalline Materials

Self Cite

View full text Add to dashboard Cite

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)

show abstract

“…The four smallest cations in this investigation, namely Ni 2+ (0.70 Â), Mg 2+ (0.72 Â), Co 2 + (0.74 Â), and Zn 2+ (0.75 Â), also display the smallest Fe/Me homogeneity ranges; it seems that the structure at the Fe-poor end of each pseudo-binary phase diagram Fe 3 (P0 4 ) 2 -Me 3 (P0 4 ) 2 is more stable. At 1070 Κ the three isomorphous "y" phases Mg 3 (P0 4 ) 2 , Co 3 (P0 4 ) 2 and "y-Zn 3 (P0 4 ) 2 ", with five-and six-coordinated cations, can incorporate ~ 60 % (Annersten et al, 1980), ~40% (Nord, 1982a), and -40% (Nord and Stefanidis, 1981b) divalent iron, respectively. The olivine-related Ni 3 (P0 4 ) 2 structure, with sixBrought to you by | New York University Bobst Library Technical Service Authenticated Download Date | 6/21/15 1:14 AM (Calvo and Faggiani, 1975), can incorporate as much as 70 % Fe 2 + at 1070 Κ and 1 bar (Ericsson and Nord, 1983).…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

“…In the y-(Znj _ r Afe I ) 3 (P0 4 )2 solid solution series there is a fairly strong correlation between cation distribution and homogeneity region (Nord and Stefanidis, 1981b). The unit cell dimensions are also clearly correlated with the Me 2 + cation radius.…”

Section: Some Final Remarksmentioning

confidence: 93%

Cation distributions in (Fe₁ _-zMe_z)₃(PO₄)₂ graftonite-type solid solutions determined by Mössbauer spectroscopy

Nord¹,

Ericsson²

1982

Zeitschrift Für Kristallographie - Crystalline Materials

Self Cite

View full text Add to dashboard Cite

Solid solutions of Me 3 (P0 4 ) 2 in Fe 3 (P0 4 ) 2 , with the graftonitetype structure, have been prepared and equilibrated at 1070 Κ (Me = Mg, Ca, Co, Ni, Zn, or Cd). The (Fe! _ 2 Afe z ) 3 (P0 4 ) 2 phases are isomorphous with Fe 3 (P0 4 ) 2 as well as with the mineral graftonite. Accurate unit cell dimensions (P2 1 /c) have been obtained from Guinier-Hägg photographic data. The unit cell volume is strongly correlated with the amount and size of the incorporated Me 2 + cation. Mössbauer spectroscopy ( 57 Fe) has been used to determine the cation distribution of Fe 2 + and Me 2 + between the three distinct cationic environments in the structure : one octahedron and two fivecoordinated polyhedra, all distorted. The order of preference for five-over six-coordination may be given as Zn 2+ > Fe 2 + , Mg 2+ , Co 2+ , Ni 2+ > Ca 2+ > Mn 2+ > Cd 2 + .

show abstract

Crystal chemistry of γ-(Zn, )3(PO4)2 solid solutions

Cited by 20 publications

References 21 publications

Thermal Behavior of Zinc Phenylphosphonate and Structure Determination ofγ-Zn2P2O7from X-Ray Powder Diffraction Data

Thermal Behavior of Zinc Phenylphosphonate and Structure Determination ofγ-Zn2P2O7from X-Ray Powder Diffraction Data

Crystallographic studies of olivine-related sarcopside-type solid solutions

Cation distributions in (Fe₁ _-zMe_z)₃(PO₄)₂ graftonite-type solid solutions determined by Mössbauer spectroscopy

Contact Info

Product

Resources

About

Crystal chemistry of γ-(Zn, )3(PO4)2 solid solutions

Cited by 20 publications

References 21 publications

Thermal Behavior of Zinc Phenylphosphonate and Structure Determination ofγ-Zn2P2O7from X-Ray Powder Diffraction Data

Thermal Behavior of Zinc Phenylphosphonate and Structure Determination ofγ-Zn2P2O7from X-Ray Powder Diffraction Data

Crystallographic studies of olivine-related sarcopside-type solid solutions

Cation distributions in (Fe1 -zMez)3(PO4)2 graftonite-type solid solutions determined by Mössbauer spectroscopy

Contact Info

Product

Resources

About

Cation distributions in (Fe₁ _-zMe_z)₃(PO₄)₂ graftonite-type solid solutions determined by Mössbauer spectroscopy