Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Radmila Krupková"'
Autor:
Dmitry Nuzhnyy, Přemysl Vaněk, Jan Petzelt, Viktor Bovtun, Martin Kempa, Ivan Gregora, Maxim Savinov, Radmila Krupková, Václav Studnička, Josef Buršík, Mihail I. Samoylovich, Wilfried Schranz
Publikováno v:
Processing and Application of Ceramics, Vol 4, Iss 3, Pp 215-223 (2010)
Using the sol-gel technique, BaTiO3 was embedded into nanoporous Vycor and artificial vitreous opal silica for the first time. About 50 vol% of the pores was filled. In case of the Vycor glass (pore diameter 4–6 nm) only amorphous phase was reveale
Externí odkaz:
https://doaj.org/article/cb802338ed114c2aab7661dd10c823fa
Publikováno v:
Acta Crystallographica Section E, Vol 68, Iss 4, Pp o1114-o1115 (2012)
In the title compound, C2H7N4O+·BF4−, intermolecular N—H...O hydrogen bonds connect the cations into chains parallel to the c axis, with graph-set motif C(4). These chains are in turn connected into a three-dimensional network by intermolecular
Externí odkaz:
https://doaj.org/article/047a161f11124fc1b53060798beb7870
Publikováno v:
Acta Crystallographica Section E, Vol 68, Iss 1, Pp o47-o48 (2012)
The title structure, 3C2H7N4O+·HFPO3−·FPO32−·H2O, contains three independent 2-carbamoylguanidinium cations, one fluorophosphonate, one hydrogen fluorophosphonate and one water molecule. There are three different layers in the structure that a
Externí odkaz:
https://doaj.org/article/b5aaf68c17984e2e8ca93abd1665e4fb
Publikováno v:
Acta Crystallographica Section E, Vol 66, Iss 3, Pp i22-i23 (2010)
The title compound, K2Zn(IO3)4·2H2O, contains two symmetry-independent K and I atoms. These atoms, as well as the Zn atom, are coordinated by shared O atoms and, moreover, the Zn atom is coordinated by two water molecules in trans positions. The K,
Externí odkaz:
https://doaj.org/article/734c9c3fec344800af0421dfe40a743a
Publikováno v:
Acta Crystallographica Section E, Vol 64, Iss 2, Pp m342-m343 (2008)
The title structure, [Zn(SeO4)(CH4N2S)3], is isomorphous with sulfatotris(thiourea)zinc(II). In both structures, the Zn2+ cation is coordinated in a tetrahedral geometry. The corresponding intramolecular distances are quite similar except for the Se
Externí odkaz:
https://doaj.org/article/dd563c9a0a6541b9b2cbcd103f168d24
Publikováno v:
Helvetica Chimica Acta. 95:1202-1216
It is shown that the larger organic molecules composed of C, H, N, and O at most crystallizing in the voluminous unit cells tend to be more loosely packed than those that crystallize in the unit cells with small volumes. This is demonstrated by the d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::980c58aefdc1b96aa09086a132cf444e
https://doi.org/10.1002/hlca.201200013
https://doi.org/10.1002/hlca.201200013
Publikováno v:
Acta Crystallographica Section C Crystal Structure Communications. 68:o71-o75
Two polymorphs of bis(2-carbamoylguanidinium) fluorophosphonate dihydrate, 2C2H7N4O+·FO3P2−·2H2O, are presented. Polymorph (I), crystallizing in the space groupPnma, is slightly less densely packed than polymorph (II), which crystallizes inPbca.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07f18ee6b0520aa3fe83d7e084421c6d
https://doi.org/10.1107/s0108270111053133
https://doi.org/10.1107/s0108270111053133
Autor:
Jan Petzelt, Maxim Savinov, Přemysl Vaněk, V. Studnička, Viktor Bovtun, Wilfried Schranz, Martin Kempa, Radmila Krupková, Ivan Gregora, Josef Buršík, I Mihail Samoylovich, Dmitry Nuzhnyy
Publikováno v:
Processing and Application of Ceramics, Vol 4, Iss 3, Pp 215-223 (2010)
Using the sol-gel technique, BaTiO3 was embedded into nanoporous Vycor and artificial vitreous opal silica for the first time. About 50 vol% of the pores was filled. In case of the Vycor glass (pore diameter 4-6 nm) only amorphous phase was revealed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76184b32bf16ff55603176d038d2306a
https://doi.org/10.2298/pac1003215n
https://doi.org/10.2298/pac1003215n
Autor:
Jan Fábry, Radmila Krupková
Publikováno v:
Ferroelectrics. 375:59-73
The dependences of occurrences of the most frequent space-group types P, P2 1 , P2 1 /c, C2/c, P2 1 2 1 2 1 and Pbca on reduced (primitive) unit-cell volumes up to 8000 A3 were investigated for organic and metal-organic compounds with different numbe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6b8c41f301760f78ab16e716f411944
https://doi.org/10.1080/00150190802437894
https://doi.org/10.1080/00150190802437894
Publikováno v:
Acta Crystallographica Section C Crystal Structure Communications. 60:m426-m430
A phase transition was found to occur at approximately 153 K in the title compound, (C8H20N)2[PdCl6]. The structures of the two phases are reported at 292 and 130 K. The low-temperature phase is twinned. The phase transition is accompanied by a minor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e74c4ebd6b9be21d0c335ea2b3096293
https://doi.org/10.1107/s0108270104016725
https://doi.org/10.1107/s0108270104016725