The thermal decomposition of nickel and zinc fluoride tetrahydrates

Lange, Bruce A.; Haendler, Helmut M.

doi:10.1016/0022-1902(73)80010-7

Cited by 15 publications

(6 citation statements)

References 4 publications

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“…O H F 0.89 (17) 2.05(17) 2.803 (19) 142 (15) This is qualitatively the same as that of the parent tetragonal MnF 2 , although the moment value determined from the NPD data at 3 K, 4.71(3) m B , is slightly lower than the theoretical value for high-spin d 5 Mn 2+ , probably due to chemical disorder of F À and OH À . It is not surprising that the magnetic structure is practically identical to that of MnF 2 despite strong distortion of the crystal structure.…”

Section: Magnetic Structure From Neutron Powder Diffraction Measurementssupporting

confidence: 62%

“…However, since the connectivity between these polyhedra is different, one-to three-dimensional empty channels have been observed (Fig. [15][16][17][18][19][20][21][22][23] Recently, during our attempts to synthesize the LiMOF (M = Mn, Fe, and Co) compositions, we obtained new M(OH)F compounds. This structural feature has attracted considerable attention from electrochemists (ref.…”

Section: Introductionmentioning

confidence: 99%

“…The M(OH)F (M = Mg, Co, Ni, Cu, Zn, Cd, and Hg) compounds do indeed exist and their crystal structures are strongly related to the a-, band g-MnOOH polymorphs. [15][16][17][18][19][20][21][22][23] Recently, during our attempts to synthesize the LiMOF (M = Mn, Fe, and Co) compositions, we obtained new M(OH)F compounds. Fe(OH)F crystallizes with the diaspore a-AlOOH structure, whereas MnF 2Àx (OH) x (x B 0.8) crystallizes with a distorted rutile structure related to the CaCl 2 -type.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of the crystal structure and magnetic properties of the hydroxyfluoride MnF2−x(OH)x (x ∼ 0.8)

Yahia

Shikano

Kobayashi

et al. 2013

Phys. Chem. Chem. Phys.

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The new compound MnF(2-x)(OH)x (x ~ 0.8) was synthesized by a hydrothermal route from a 1 : 1 molar ratio of lithium fluoride and manganese acetate in an excess of water. The crystal structure was determined using the combination of single crystal X-ray and neutron powder diffraction measurements. The magnetic properties of the title compound were characterized by magnetic susceptibility and low-temperature neutron powder diffraction measurements. MnF(2-x)(OH)x (x ~ 0.8) crystallizes with orthorhombic symmetry, space group Pnn2 (no. 34), a = 4.7127(18), b = 5.203(2), c = 3.2439(13) Å, V = 79.54(5) Å(3) and Z = 2. The crystal structure is a distorted rutile-type with [Mn(F,O)4] infinite edge-sharing chains along the c-direction. The protons are located in the channels and form O-HF bent hydrogen bonds. The magnetic susceptibility measurements indicate an antiferromagnetic ordering at ~70 K and the neutron powder diffraction measurements at 3 K show that the ferromagnetic chains with spins parallel to the c-axis are antiferromagnetically coupled to each other, similarly to the magnetic structure of tetragonal rutile-type MnF2 with isoelectronic Mn(2+). MnF(2-x)(OH)x (x ~ 0.8) is expected to be of great interest as a positive electrode for Li cells if the protons could be exchanged for lithium.

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Section: Magnetic Structure From Neutron Powder Diffraction Measurementssupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of the crystal structure and magnetic properties of the hydroxyfluoride MnF2−x(OH)x (x ∼ 0.8)

Yahia

Shikano

Kobayashi

et al. 2013

Phys. Chem. Chem. Phys.

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“…Zn(OH)F-type.'' The structure of Ni(OH)F is also related to diaspore (Lange and Haendler, 1973). Other hydroxyfluorides of divalent cations are either of the belloite-type (Schluter et al, 2000), or the rutile-related Cd(OH)F-type (Kister, 2003;Serier, 2009).…”

Section: Discussionmentioning

confidence: 99%

Synthesis and structure of magnesium hydroxide fluoride, Mg(OH)F: a topological intermediate between brucite- and rutile-type structures

Crichton¹,

Parise²,

Müller³

et al. 2012

Mineral. mag.

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Magnesium hydroxyfluoride, Mg(OH)F, has been synthesized by a subcritical hydrothermal route from a 1:1 molar mixture of brucite, Mg(OH)2, and sellaite, MgF2 with a rutile type structure, in excess water. Using a combination of synchrotron X-ray and time-of-flight neutron powder diffraction, the structure of Mg(OH)F has been solved in the diaspore space group Pnma with a = 10.116(3), b = 4.6888(10) and c = 3.0794(7) Å at ambient conditions. The most intense diffraction lines are [dobs (hkl) Iobs]: 2.291 (211) 10, 4.253 (101) 7, 1.747 (212) 7, 2.229 (401) 6 and 1.480 (610) (4) Å, with the largest d-spacing at 5.058 Å. Sharp infrared stretching bands are located at 3679 and 3645 cm–1, with a broader band at 3535 cm–1. The topology of the structure is intermediate between that of the OH and F endmembers, being derived through notional shearing nearly normal to the sheets of octahedra of the CdI2/Mg(OH)2-type structure. Further similar shearing at an interval 1/2a would lead to a Cd(OH)F-type structure, which is also related to the rutile structure type. The observations and model presented here indicate a close correlation between the structural properties of the endmembers and Mg(OH)F.

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“…When the trivalent manganese ion is replaced by a divalent transition-metal or alkali-earth-metal ion and one oxide ion is replaced by a fluoride ion, a homologous family of compounds is formed. The M(OH)F (M = Mg, Co, Ni, Cu, Zn, Cd, and Hg) compounds do indeed exist, and their crystal structures are strongly related to the α-, β-, and γ-MnOOH polymorphs. − Recently, during our attempts to synthesize the LiMOF (M = Mn, Fe, and Co) compositions, we obtained new M(OH)F compounds. The Fe(OH)F and Co(OH)F structures are related to the diaspore α-AlOOH structure, whereas Mn(OH)F crystallizes with a distorted rutile structure related to the CaCl 2 type.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of the Crystal and Magnetic Structures and Properties of the Hydroxyfluorides Fe(OH)F and Co(OH)F

et al. 2013

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The title compounds were synthesized by a hydrothermal route from a 1:1 molar ratio of lithium fluoride and transition-metal acetate in an excess of water. The crystal structures were determined using a combination of powder and/or single-crystal X-ray and neutron powder diffraction (NPD) measurements. The magnetic structure and properties of Co(OH)F were characterized by magnetic susceptibility and low-temperature NPD measurements. M(OH)F (M = Fe and Co) crystallizes with structures related to diaspore-type α-AlOOH, with the Pnma space group, Z = 4, a = 10.471(3) Å, b = 3.2059(10) Å, and c = 4.6977(14) Å and a = 10.2753(3) Å, b = 3.11813(7) Å, and c = 4.68437(14) Å for the iron and cobalt phases, respectively. The structures consist of double chains of edge-sharing M(F,O)6 octahedra running along the b axis. These infinite chains share corners and give rise to channels. The protons are located in the channels and form O-H···F bent hydrogen bonds. The magnetic susceptibility indicates an antiferromagnetic ordering at ∼40 K, and the NPD measurements at 3 K show that the ferromagnetic rutile-type chains with spins parallel to the short b axis are antiferromagnetically coupled to each other, similarly to the magnetic structure of goethite α-FeOOH.

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The thermal decomposition of nickel and zinc fluoride tetrahydrates

Cited by 15 publications

References 4 publications

Synthesis and characterization of the crystal structure and magnetic properties of the hydroxyfluoride MnF2−x(OH)x (x ∼ 0.8)

Synthesis and characterization of the crystal structure and magnetic properties of the hydroxyfluoride MnF2−x(OH)x (x ∼ 0.8)

Synthesis and structure of magnesium hydroxide fluoride, Mg(OH)F: a topological intermediate between brucite- and rutile-type structures

Synthesis and Characterization of the Crystal and Magnetic Structures and Properties of the Hydroxyfluorides Fe(OH)F and Co(OH)F

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