ChemInform Abstract: Structure of the Double Pyrovanadate K2MgV2O7.

Мурашова, Е. В.; Velikodnyi, Yu. A.; Trunov, V. K.

doi:10.1002/chin.198835006

Cited by 12 publications

(16 citation statements)

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“…4(d)) except the V=O groups of pyrovanadate units are oriented in opposite directions while they are oriented in the same direction in K2V3O8. The interlayer spacing is 3.230 Å and similar to that observed in K2MgV2O7 [17], but larger than the 3.055 Å in K2(VO)V2O7 [20] and smaller than the 3.477 Å in Rb2MnV2O7 and the 3.444 Å in KRbMnV2O7 [21]. …”

Section: The Crystal Structure Of K2znv2o7supporting

confidence: 71%

“…136). The c axis length is double that of K2V3O8, space group P4bm, consistent with the existence of the mirror plane perpendicular to the [001] direction between two [BV2O7]n 2n-layers (B = Mg in [17] and Zn herein). The structure contains [ZnV2O7]n 2n-layers with K + positioned between the layers forming two unique distorted square-prismatic KO8 coordination environments as can be seen in Fig.…”

Section: The Crystal Structure Of K2znv2o7supporting

confidence: 64%

“…Unit cell parameters and space group were determined by standard procedures [16] from data collected on a Bruker Smart Apex CCD diffractometer at 1002 K. Crystal data are given in Table 2. The new compound is isomorphous with K2MgV2O7 [17]. …”

Section: X-ray Crystallographymentioning

confidence: 94%

“…Single crystal X-ray diffraction shows K2ZnV2O7 to be isomorphous to K2MgV2O7 [17] with tetragonal space group P42/mnm (No. 136).…”

Section: The Crystal Structure Of K2znv2o7mentioning

confidence: 99%

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Improved Synthesis of Alkali Metal Vanadates Using a Hydrothermal Method

Krachodnok¹,

Haller²,

Willaims³

2012

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Abstract. High product yield of highly crystalline layered MxV3O8 compounds was obtained under hydrothermal conditions from the V2O5-Zn(OAc)22H2O-alkali metal salt-H2O system at significantly lower reaction temperature than previously reported in neutral media for x = 1 and M = K + , Rb + , and Cs + , and in basic media for x = 2 and M = K + . Unreacted Zn(OAc)2 may act as a catalyst and/or HOAc/OAc -acts as a buffer in obtaining monopotassium salts while enMe used to adjust pH can also act as a reducing agent in producing the dipotassium salt. A new layered dipotassium zinc pyrovanadate compound, K2ZnV2O7, was formed when twice the stoichiometric ratio of the zinc salt was used. Single crystal X-ray diffraction shows the zinc compound to crystallize in the tetragonal space group P42/mnm (No. 136) with a = 8.3478(16) Å, c = 11.297(3) Å, V = 787.2(3) Å 3 , and thus to be isomorphous with K2MgV2O7. The pentagonal-motif layer structure of K2ZnV2O7 is similar to that of K2(VO)V2O7, but the unit cell parameters differ with approximate doubling of the c axial length when replacing the square-pyramidal VO5 units of the [(V 4+ O)(V 5+ 2O7)]n 2n-layer with distorted ZnO4 tetrahedra.

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Section: The Crystal Structure Of K2znv2o7supporting

confidence: 71%

Section: The Crystal Structure Of K2znv2o7supporting

confidence: 64%

Section: X-ray Crystallographymentioning

confidence: 94%

“…Single crystal X-ray diffraction shows K2ZnV2O7 to be isomorphous to K2MgV2O7 [17] with tetragonal space group P42/mnm (No. 136).…”

Section: The Crystal Structure Of K2znv2o7mentioning

confidence: 99%

See 2 more Smart Citations

Improved Synthesis of Alkali Metal Vanadates Using a Hydrothermal Method

Krachodnok¹,

Haller²,

Willaims³

2012

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“…Im Gegensatz zu den seit langem bekannten Alkali-Erdalkalimetall-Oxovanadaten, NaCa0 sV60 16 [1], N aC aV 0 4 [2,3], UMgb.125V lfg75C>4 [4], K2MgV20 7 [5], NaMg4V30 12 [6], L iM gV 04 [7] gibt es mit Ausnahme von KBaCuV20 7Cl [8] praktisch keine Untersuchungen an Alkali-Erdalkalimetall-Halogeno-Oxovanadaten. Das glei che Ergebnis zeigt die Literaturdurchsicht bei den Erdalkalim etall-Halogeno-Oxovanadaten, die al lein durch Ca2V 0 4Cl [9] vertreten werden.…”

Section: Introductionunclassified