Compound

CN

d(Cu-O) (Å)

Bond strength

Reference

se

sa

Ss

Ca0.5Sr0.5CuO4

4

1.945

1.913

-

1.913

[41]

CaCuO2

1.928

2.004

-

2.004

[33]

BaCuSi4O10 Effenbergite

1.925

2.022

-

2.022

[42]

SrCuSi4O10 Wesselite

1.925

2.022

-

2.022

[43]

CaCuSi4O10 Cuprorivaite

1.929

1.998

-

1.998

[44]

Cu6Si6O18

4 + (1)

1.9250 1.9294

1.9354 1.9466 3.3153

1.969

0.023

1.992

[20]

Cu6Ge6O18

1.9043 1.9284

1.9380 1.9979 3.3841

1.954

-

1.954

[17]

Y2BaCuO5

2 + 2 + 1

1.985 1.988 2.206

1.692

0.232

1.923

[45]

CuGeO3

4 + 2

1.941 2.926

1.941

0.093

2.022

[1] [2] [3]

Cu6Si6O18・6H2O

6

1.952 1.952 1.959

1.983 2.502 2.648

1.818

0.195

2.014

[46]

Cu6Ge5.4Si0.6O18・6H2O

6

[17]

Cu6Ge6O18・6H2O

6

1.9037 1.9486 1.9547 1.9884 2.6364 2.6696

1.894

0.159

2.053

[11]

Cu3(CO3)2(OH)2 Azurite

2 + 2 + 2 Cu(1) site

1.9387 1.9455 2.9840

1.953

0.083

2.036

[47]

6 Cu(2) site

1.9385 1.9388 1.9675 1.9947 2.3608 2.7578

1.830

0.223

2.053

CuSO4 ・5H2O Chalcanthite

2+2+2 Cu(1) site

1.9748 1.9770 2.3858

1.769

0.250

2.019

[48]

2+2+2 Cu(2) site

1.9447 1.9696 2.4400

1.739

0.293

2.033

KNaCuSi4O10

Litidionite

6

1.9220 1.9434

1.9683 1.9799

2.6238 3.4024

1.863

0.109

1.972

[22] ; this work

Cu3(AsO4)2

Lammerite

2 + 2 + 2 Cu(1) site

1.933 1.974 2.923

1.864

0.093

1.957

[49]

6

Cu(2) site

1.941 1.947 1.972 2.028 2.282 2.782

1.772

0.254

2.026

CaCuAsO4OH

Conichalcite

6

1.8850 1.8855

2.0666 2.0688

2.2976 2.3882

1.811

0.332

2.143

[50] ; this work

La2CuO4

4 + 2

1.9043 2.4145

2.151

0.278

2.439

[51]

Sr2CuO2Cl2

4 + 2

1.9864 2.860

1.687

0.292

1.979

[52]