Synthesis, crystal structure and magnetic properties of a new fluoride carbonate Ba2Co(CO3)2F2

Ali, A. Ben; Maisonneuve, Vincent; Kodjikian, Stéphanie; Smiri, Leila Samia; Leblanc, M.

doi:10.1016/s1293-2558(02)01274-8

Cited by 14 publications

(16 citation statements)

References 6 publications

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“…In the Co1F 2 O 4 octahedra, the Co1–X distances range from 2.038 to 2.150 Å with an average value of 2.091 Å, whereas in the Co2F 2 O 4 octahedra the Co2–X distances range from 2.069 to 2.125 Å with an average distance of 2.095 Å. Such a six-coordinate Co 2+ environment occurs also in Ba 2 Co[CO 3 ] 2 F 2 with distances ranging from 2.046 to 2.111 Å and an average distance of 2.073 Å, in good agreement with our results. The BVSs of 1.980 and 1.956 are in very good agreement with the expected value of +2 for Co 2+ .…”

Section: Resultsmentioning

confidence: 93%

Synthesis and Characterization of the Crystal Structure and Magnetic Properties of the New Fluorophosphate LiNaCo[PO₄]F

et al. 2012

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The new compound LiNaCo[PO(4)]F was synthesized by a solid state reaction route, and its crystal structure was determined by single-crystal X-ray diffraction measurements. The magnetic properties of LiNaCo[PO(4)]F were characterized by magnetic susceptibility, specific heat, and neutron powder diffraction measurements and also by density functional calculations. LiNaCo[PO(4)]F crystallizes with orthorhombic symmetry, space group Pnma, with a = 10.9334(6), b = 6.2934(11), c = 11.3556(10) Å, and Z = 8. The structure consists of edge-sharing CoO(4)F(2) octahedra forming CoFO(3) chains running along the b axis. These chains are interlinked by PO(4) tetrahedra forming a three-dimensional framework with the tunnels and the cavities filled by the well-ordered sodium and lithium atoms, respectively. The magnetic susceptibility follows the Curie-Weiss behavior above 60 K with θ = -21 K. The specific heat and magnetization measurements show that LiNaCo[PO(4)]F undergoes a three-dimensional magnetic ordering at T(mag) = 10.2(5) K. The neutron powder diffraction measurements at 3 K show that the spins in each CoFO(3) chain along the b-direction are ferromagnetically coupled, while these FM chains are antiferromagnetically coupled along the a-direction but have a noncollinear arrangement along the c-direction. The noncollinear spin arrangement implies the presence of spin conflict along the c-direction. The observed magnetic structures are well explained by the spin exchange constants determined from density functional calculations.

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Section: Resultsmentioning

confidence: 93%

Synthesis and Characterization of the Crystal Structure and Magnetic Properties of the New Fluorophosphate LiNaCo[PO₄]F

et al. 2012

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“…Much work has been devoted to the synthesis of 3d transition metal fluoride phosphates, fluoride selenites, and fluoride tellurites at low temperature ( T < 250 °C), where the transition-metal-containing starting material coordinated fluoride. ,, A number of gallium fluoride phosphate and iron fluoride phosphate materials , were also prepared by the hydrothermal reaction under subcritical conditions using HF as a mineralizer. Hydrothermal growth under supercritical conditions mainly led to fluoride oxysalts. − Due to their strict preparation conditions, very little work has been done on fluoride-rich oxysalts.…”

Section: Introductionmentioning

confidence: 99%

Variable Dimensionality, Valence, and Magnetism in Fluoride-Rich Iron Phosphates Ba_xFe_x(PO₄)F_y (1 ≤ x ≤ 3, 2 ≤ y ≤ 12)

et al. 2018

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We report the synthesis and characterization of three fluoride-rich barium iron phosphates Ba x Fe x (PO4)F y (1 ≤ x ≤ 3, 2 ≤ y ≤ 12), which exhibited abundant structural chemistry, exhibiting diverse frameworks and connecting modes between [FeO n F6–n ] m – octahedra surrounding Fe2+ or Fe3+ ions. BaFe(PO4)F2 (I) consisted of two-dimensional [Fe(PO4)F2]2– sheets built from linear ∞[Fe2O6F4]10– moieties formed by fluorine corner-sharing FeO4F2 and FeO2F4 octahedra with linking PO4 tetrahedra. Mixed-valence Ba2Fe2(PO4)F6 (II) possessed a three-dimensional framework containing Fe4O6F12 tetramers formed by the edge-sharing oxygen or fluorine atoms of cis-FeF4O2 octahedra. Ba3Fe3(PO4)F12 (III) contained one-dimensional columns of ∞[Fe3(PO4)F12]6– infinite sections built from cis-FeF4O2 and FeF5O octahedra and tetrahedral PO4 linkers. The magnetic characterization of Ba x Fe x (PO4)F y unveiled diverse magnetism: an S = 5/2 spin chain for (I), a weak ferrimagnet or canted antiferromagnet for (II) thanks to the presence of distinct Fe2+ and Fe3+ sites identified by Mössbauer spectroscopy, and coupled spin-trimers for (III).

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“…An intense second harmonic generation (SHG) signal was observed in K 4 RE 2 (CO 3 ) 3 F 4 (RE = Nd, Sm, Eu, Gd), but large single crystals could not be grown. Some transition metal fluoride carbonates − such as KCu(CO 3 )F and BaM(CO 3 )F 2 (M = Mn, Cu, Zn) and rare earths fluoride carbonates − have been crystallized in subcritical and supercritical hydrothermal conditions. Only one phase, KCa(CO 3 )F, , has been synthesized by solid-state reaction, but attempts at growing the single crystals had failed.…”

Section: Introductionmentioning

confidence: 99%

Alkaline-Alkaline Earth Fluoride Carbonate Crystals ABCO₃F (A = K, Rb, Cs; B = Ca, Sr, Ba) as Nonlinear Optical Materials

et al. 2011

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A new series of alkaline-alkaline earth fluoride carbonates (KSrCO(3)F, RbSrCO(3)F, KCaCO(3)F, RbCaCO(3)F, CsCaCO(3)F, and Cs(3)Ba(4)(CO(3))(3)F(5)) were synthesized by spontaneous crystallization with molten fluxes. Their crystal structures, except for Cs(3)Ba(4)(CO(3))(3)F(5), exhibit the stacking of [AF](∞) (A = K, Rb, Cs) and [B(CO(3))](∞) (B = Ca, Sr) layers, and the coplanar alignment of [CO(3)] triangles. The results from the UV-vis diffuse reflectance spectroscopy study of the powder samples indicated that the short-wavelength absorption edges were all below 200 nm, except for Cs(3)Ba(4)(CO(3))(3)F(5), which is about 210 nm. Second-harmonic generation (SHG) on polycrystalline samples was measured using the Kurtz and Perry technique, which indicated that these carbonates are all phase-matchable materials in both visible and the UV region, and their measured SHG coefficients were about 3.33, 3.33, 3.61, 1.11, 1.11, and 1.20 times as large as that of d(36) (KDP), respectively.

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Synthesis, crystal structure and magnetic properties of a new fluoride carbonate Ba2Co(CO3)2F2

Cited by 14 publications

References 6 publications

Synthesis and Characterization of the Crystal Structure and Magnetic Properties of the New Fluorophosphate LiNaCo[PO₄]F

Synthesis and Characterization of the Crystal Structure and Magnetic Properties of the New Fluorophosphate LiNaCo[PO₄]F

Variable Dimensionality, Valence, and Magnetism in Fluoride-Rich Iron Phosphates Ba_xFe_x(PO₄)F_y (1 ≤ x ≤ 3, 2 ≤ y ≤ 12)

Alkaline-Alkaline Earth Fluoride Carbonate Crystals ABCO₃F (A = K, Rb, Cs; B = Ca, Sr, Ba) as Nonlinear Optical Materials

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Synthesis, crystal structure and magnetic properties of a new fluoride carbonate Ba2Co(CO3)2F2

Cited by 14 publications

References 6 publications

Synthesis and Characterization of the Crystal Structure and Magnetic Properties of the New Fluorophosphate LiNaCo[PO4]F

Synthesis and Characterization of the Crystal Structure and Magnetic Properties of the New Fluorophosphate LiNaCo[PO4]F

Variable Dimensionality, Valence, and Magnetism in Fluoride-Rich Iron Phosphates BaxFex(PO4)Fy (1 ≤ x ≤ 3, 2 ≤ y ≤ 12)

Alkaline-Alkaline Earth Fluoride Carbonate Crystals ABCO3F (A = K, Rb, Cs; B = Ca, Sr, Ba) as Nonlinear Optical Materials

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Synthesis and Characterization of the Crystal Structure and Magnetic Properties of the New Fluorophosphate LiNaCo[PO₄]F

Synthesis and Characterization of the Crystal Structure and Magnetic Properties of the New Fluorophosphate LiNaCo[PO₄]F

Variable Dimensionality, Valence, and Magnetism in Fluoride-Rich Iron Phosphates Ba_xFe_x(PO₄)F_y (1 ≤ x ≤ 3, 2 ≤ y ≤ 12)

Alkaline-Alkaline Earth Fluoride Carbonate Crystals ABCO₃F (A = K, Rb, Cs; B = Ca, Sr, Ba) as Nonlinear Optical Materials