Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Igor Oshchapovsky"'
Publikováno v:
BMC Chemistry, Vol 14, Iss 1, Pp 1-14 (2020)
Abstract Naturally occurring phyllosilicate minerals such as talc and vermiculite in conjunction with n-tetra butyl ammonium bromide (TBAB) co-catalyst were found to be efficient in the coupling of CO2 with epoxides to form cyclic carbonates. The rea
Externí odkaz:
https://doaj.org/article/731f72eb87ed40b19324241dce392a3b
Publikováno v:
Acta Crystallographica Section E, Vol 70, Iss 1, Pp i2-i3 (2014)
The title non-stoichiometric pentalanthanum zinc diplumbide, La5Zn1−xPb2+x (x ≃ 0.6), was prepared from the elements in an evacuated silica ampoule. It adopts the Nb5Sn2Si-type structure (space group I4/mcm, Pearson symbol tI32), a ternary ordere
Externí odkaz:
https://doaj.org/article/f380b029c9c34c2e9286f8d392560757
Autor:
Andrij Stetskiv, Ivan Tarasiuk, Beata Rozdzynska-Kielbik, Igor Oshchapovsky, Volodymyr Pavlyuk
Publikováno v:
Acta Crystallographica Section E, Vol 68, Iss 2, Pp i16-i16 (2012)
The new terbium (lithium zinc) distannide, TbLi1–xZnxSn2 (x = 0.2) crystallizes in the orthorhombic CeNiSi2 structure type with space group Cmcm and Pearson symbol oS16. Of the four independent 4c atom positions (m2m site symmetry), three are fully
Externí odkaz:
https://doaj.org/article/d776faaab47e4994985b315a1ff0b511
Publikováno v:
Acta Crystallographica Section E, Vol 68, Iss 1, Pp i1-i1 (2012)
The crystal structure of the already known binary title compound LaZn5 (lanthanum pentazinc) (space group P6/mmm, Pearson symbol hP6, CaCu5 structure type) has been redetermined from single-crystal X-ray diffraction data. In contrast to previous dete
Externí odkaz:
https://doaj.org/article/f3adae4b9da54758a1ab05c2a5164893
Publikováno v:
Acta Crystallographica Section E, Vol 67, Iss 11, Pp i65-i65 (2011)
A single crystal of pentalanthanum dizinc stannide, La5Zn2Sn, was obtained from the elements in a resistance furnace. It belongs to the Mo5SiB2 structure type, which is a ternary ordered variant of the Cr5B3 structure type. The space is filled by bic
Externí odkaz:
https://doaj.org/article/0b2ee542e3094fac9d2838fbb80c58c7
Publikováno v:
Acta Crystallographica Section E, Vol 67, Iss 8, Pp i43-i43 (2011)
The title compound (lanthanum dodecazinc), LaZn12.37 (1), is confirmed to be a nonstoichiometric (zinc-deficient) modification of the NaZn13 structure type, in which one Zn atom (Wyckoff site 8b, site symmetry moverline{3}) has a fractional site occu
Externí odkaz:
https://doaj.org/article/0a59c44b869a4fbe81b57a8183e00f0e
Publikováno v:
Acta Crystallographica Section E, Vol 66, Iss 12, Pp i82-i82 (2010)
The title compound, terbium hexaniobium hexastannide, TbNb6Sn6, is the first ternary compound from the rare earth–niobium–tin system. It has the HfFe6Ge6 structure type, which can be analysed as an intergrowth of the Zr4Al3 and CaCu5 structures.
Externí odkaz:
https://doaj.org/article/1e6e8061149244ab8b0ae2cb5833b483
Publikováno v:
Journal of Solid State Chemistry. 323:123926
Publikováno v:
Materials Science. 57:53-60
Publikováno v:
Inorganic Chemistry. 58:12590-12600
The crystal structure of the high-temperature modification of the compound Li2Zn5 was determined using single-crystal X-ray diffraction data. It is the first representative of a new binary structure type with triclinic space group P1, where the param