15 Questions
What is the name of the compound that became superconducting in 1986?
La2-xBaxCuO4
Who discovered the superconducting properties of La2-xBaxCuO4?
Bednorz and Müller
What is the year in which the oxide superconductors were discovered?
1986
What is the reaction that reduces Ln4+ to Ln2O3?
Reduction with H2.O
What is the general formula of the compound that became superconducting in 1986?
La2-xBaxCuO4
What is the range of coordination numbers observed in Ln3+ complexes?
3-12
What is the more common type of coordination number in Ln3+ complexes?
Higher coordination numbers
What is the oxidation state of the central metal atom in Ln3+ complexes?
+3
What type of metal atom is present in Ln3+ complexes?
Lanthanide metal
What is the relationship between coordination number and the central metal atom in Ln3+ complexes?
The coordination number is directly proportional to the size of the central metal atom
What is the temperature at which Nb3Ge exhibits zero resistivity?
30 K
Which of the following lanthanides is NOT used to prepare divalent oxides through reduction of Ln2O3?
La
What is the structural characteristic of the C-type Ln2O3?
LnO6 units, but not octahedral
At what temperature range are the divalent oxides prepared through reduction of Ln2O3?
800-2000 oC
What is the common method for preparing divalent oxides of Nd, Sm, Eu, and Yb?
Reduction of Ln2O3 with the elemental lanthanide
Test your knowledge of superconductors, including the discovery of oxide superconductors in 1986 by Bednorz and Müller, and the properties of La2-xBaxCuO4 compounds. Learn about the conditions under which these compounds exhibit superconductivity. Get ready to explore the world of superconductors!
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
