An X-ray and neutron diffraction study of mercury(II) sulphate monohydrate

Stålhandske, Claes

doi:10.1107/s0567740880002361

Cited by 15 publications

(2 citation statements)

References 7 publications

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“…In most mercuric compounds, Hg 2+ ions form either two collinear (sp) or four tetrahedral (sp 3 ) bonds . The Hg−O bond lengths vary widely from 2.05 to 2.90 Å in various octahedral environments. − …”

Section: Discussionmentioning

confidence: 99%

Crystal Structure of Anhydrous NH₄⁺-Exchanged Zeolite X Partially Reacted with HgCl₂ Vapor. Cationic Chloromercuric Clusters, Regular Octahedral Hg(II), and Regular Trigonal Hg(II)

Zhen

Seff

1999

J. Phys. Chem. B

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The product of the reaction of HgCl2 vapor with fully dehydrated fully NH4 +-exchanged zeolite X at 115 °C, ca. Hg44Cl64(NH4)68−Si100Al92O384 per unit cell, was studied by single-crystal X-ray diffraction techniques at 23 °C (R 1 = 0.121) in the cubic space group Fd3̄ (a 0 = 25.094(8) Å). Hg2+ ions are found at seven nonequivalent sites, a surprisingly large number. Hg2+ ions at sites I and II each coordinate only to framework oxygens; this is the first observation of Hg2+ ions at conventional ionic sites in a zeolite, and of very nearly regular octahedral Hg(II), and of three-coordinate trigonal Hg(II). Hg2+ ions at two general site III‘ positions form (HgCl2)3(NH4 +)2 and (HgCl2)3(NH4 +) clusters, respectively, in 12-rings with each Hg2+ ion bonding to one framework oxygen. The Hg2+ ions at another two general site III‘ positions form (HgCl2)6(NH4 +)2 clusters, also in 12-rings with each Hg2+ ion bonding to two framework oxygens. These two clusters could bridge through Cl- ions to form a supercluster that contains as alternative subunits Hg12Cl12 rings each of which wraps around a double six-ring. Site II is full with two Hg2+ and 30 NH4 + ions. In each sodalite cage, an NH4 + ion at site I‘ bonds to three framework oxygens. Two Hg2+ ions per unit cell are seen near supercage centers; each coordinates to three Cl- ions that bridge to other Hg2+ ions. The desired reaction of NH4-X with HgCl2 vapor did not go to completion. Substantial amounts of HgCl2 were sorbed and cationic superclusters of Hg(II) and Cl- have formed. This is the first observation of cationic halomercuric species.

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Section: Discussionmentioning

confidence: 99%

Crystal Structure of Anhydrous NH₄⁺-Exchanged Zeolite X Partially Reacted with HgCl₂ Vapor. Cationic Chloromercuric Clusters, Regular Octahedral Hg(II), and Regular Trigonal Hg(II)

Zhen

Seff

1999

J. Phys. Chem. B

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“…The crystal stuctures of some members of the sulphate series were previously determined [9][10][11][12]. The most interesting group in the structures of these compounds is the sulphate group SO4 which is usually found to arrange in tetrahedral or polyhedral symmetries.…”

Section: Introductionmentioning

confidence: 99%

Electrical and Thermal Conductivities of Some Sulphate Compounds

et al. 1993

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The electrical conductivity σ and the thermal conductivity λ were investigated at varying temperature (40 < T < 120°C) for two sulphate compounds, anhydrous mercury(II) sulphate HgSO4 and cerous(III) sulphate Ce2(SO4)3 • H2O. It seems likely that each of the two sulphate salts undergoes structural phase transition around 90°C. The differential thermal analysis thermogram was carried out as an aid for confirming of the observed phase transitions. The mechanism of the heat transfer is mainly due to phonons. Interpretation of the obtained data was given on the basis of the reorientational motion of the SO4--ions.

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Explorations of New SHG Materials in Mercury Iodate Sulfate System**

et al. 2022

Chemistry A European J

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Through systematic experiments, two novel mercury iodate sulfates, namely, Hg 2 (IO 3 ) 2 (SO 4 )(H 2 O) and Hg 2 (IO 3 ) 2 (SO 4 ) were obtained. They crystallize in monoclinic space group C2 and C2/c, respectively. Hg 2 (IO 3 ) 2 (SO 4 )(H 2 O) exhibits the [Hg(IO 3 )] + polar cationic layer inherited from Hg(IO 3 ) 2 and the three-dimensional (3D) framework inherited from HgSO 4 . This enables Hg 2 (IO 3 ) 2 (SO 4 )(H 2 O) to generate a strong second harmonic generation (SHG) response of 6 times that of KH 2 PO 4 (KDP). The structure of Hg 2 (IO 3 ) 2 (SO 4 ) is very similar to that of Hg 2 (IO 3 ) 2 (SO 4 )(H 2 O), and they can be transformed into each other. Hg 2 (IO 3 ) 2 (SO 4 )(H 2 O) shows a large optical band gap of 3.98 eV and a high dehydration temperature of 250 °C. This study indicates that by reasonable design, the introduction of multiple functional groups into a compound may combine their advantages to achieve good overall optical performance.

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An X-ray and neutron diffraction study of mercury(II) sulphate monohydrate

Cited by 15 publications

References 7 publications

Crystal Structure of Anhydrous NH₄⁺-Exchanged Zeolite X Partially Reacted with HgCl₂ Vapor. Cationic Chloromercuric Clusters, Regular Octahedral Hg(II), and Regular Trigonal Hg(II)

Crystal Structure of Anhydrous NH₄⁺-Exchanged Zeolite X Partially Reacted with HgCl₂ Vapor. Cationic Chloromercuric Clusters, Regular Octahedral Hg(II), and Regular Trigonal Hg(II)

Electrical and Thermal Conductivities of Some Sulphate Compounds

Explorations of New SHG Materials in Mercury Iodate Sulfate System**

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An X-ray and neutron diffraction study of mercury(II) sulphate monohydrate

Cited by 15 publications

References 7 publications

Crystal Structure of Anhydrous NH4+-Exchanged Zeolite X Partially Reacted with HgCl2 Vapor. Cationic Chloromercuric Clusters, Regular Octahedral Hg(II), and Regular Trigonal Hg(II)

Crystal Structure of Anhydrous NH4+-Exchanged Zeolite X Partially Reacted with HgCl2 Vapor. Cationic Chloromercuric Clusters, Regular Octahedral Hg(II), and Regular Trigonal Hg(II)

Electrical and Thermal Conductivities of Some Sulphate Compounds

Explorations of New SHG Materials in Mercury Iodate Sulfate System**

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Product

Resources

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Crystal Structure of Anhydrous NH₄⁺-Exchanged Zeolite X Partially Reacted with HgCl₂ Vapor. Cationic Chloromercuric Clusters, Regular Octahedral Hg(II), and Regular Trigonal Hg(II)

Crystal Structure of Anhydrous NH₄⁺-Exchanged Zeolite X Partially Reacted with HgCl₂ Vapor. Cationic Chloromercuric Clusters, Regular Octahedral Hg(II), and Regular Trigonal Hg(II)