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Atkins' Physical Chemistry | 11th Edition | ISBN: 9780198769866 | Authors: Atkins, Peter; De Paula, Julio; Keeler, James ISBN: 9780198769866 2042

Solution for problem P15E.6 Chapter 15E

Atkins' Physical Chemistry | 11th Edition

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Atkins' Physical Chemistry | 11th Edition | ISBN: 9780198769866 | Authors: Atkins, Peter; De Paula, Julio; Keeler, James

Atkins' Physical Chemistry | 11th Edition

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Problem P15E.6

P.G. Radaelli et al. (Science 265, 380 (1994)) reported the synthesis and structure of a material that becomes superconducting at temperatures below 45 K. The compound is based on a layered compound \(\mathrm{Hg}_{2} \mathrm{Ba}_{2} \mathrm{YCu}_{2} \mathrm{O}_{8-\delta}\), which has a tetragonal unit cell with a=0.38606 nm and c=2.8915 nm; each unit cell contains two formula units. The compound is made superconducting by partially replacing Y by Ca, accompanied by a change in unit cell volume by less than 1 per cent. Estimate the Ca content x in superconducting \(\mathrm{Hg}_{2} \mathrm{Ba}_{2} \mathrm{Y}_{1-x} \mathrm{Ca}_{x} \mathrm{Cu}_{2} \mathrm{O}_{7.55}\) given that the mass density of the compound is \(7.651 \mathrm{~g} \mathrm{~cm}^{-3}\).

Text Transcription:

Hg_2 Ba_2 YCu_2 O_8-delta

Hg_2 Ba_2 Y_1-x Ca_x Cu_2 O_7.55

7.651 g cm^-3

Step-by-Step Solution:
Step 1 of 3

t Nffin,v* ,n i -tfOs:etl^.rch ;Ti1. :l , trr 1, ' !- '.i Y +X : I ,Q.ol6O*ry:ot h{o 30+ L { b i: i U* S, ii \ "'rt,^t I \ a

Step 2 of 3

Chapter 15E, Problem P15E.6 is Solved
Step 3 of 3

Textbook: Atkins' Physical Chemistry
Edition: 11
Author: Atkins, Peter; De Paula, Julio; Keeler, James
ISBN: 9780198769866

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