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Table 10 Interatomic distances in orthovanadates, divanadates and diphosphates of Cu and Mg

From: Structural characterization and colour of MgxCu3-xV2O8 (0 ≤ x ≤ 3) and MgyCu2-yV2O7 (0 ≤ y ≤ 2) compositions

Composition

Mg 2+ -O (Å)

Cu 2+ -O (Å)

V-O or P-O (Å)

1 Cu3V2O8

-----

1.912 (4) - 1.988 (5)

1.643 (3) - 1.795 (4)

1 Cu3P2O8

-----

1.925 (3) - 1.981 (3)

1.510 (2) - 1.572 (2)

1 Mg3V2O8

2.022 (1) - 2.135 (1)

-----

1.695 (1) - 1.809 (1)

1 Mg3P2O8

1.965 (8) - 2.142 (7)

-----

1.527 (5) - 1.535 (8)

2 MgxCu3-xV2O8

1.880 (2) - 2.306 (1)

1.570 (3) -1.972 (2)

1 Cu2V2O7

-----

1.880 (5) - 2.542 (4)

1.644 (7) - 1.770 (4)

1 Cu2P2O7

-----

1.929 (1) - 2.313 (1)

1.437 (1) - 1.561 (1)

1 Mg2V2O7

1.992 (3) - 2.221 (3)

-----

1.629 (3) - 1.817 (4)

1 Mg2P2O7

1.850 (1) - 2.381 (1)

-----

1.543 (1) - 1.785 (1)

2 MgyCu2-yV2O7

1.862 (3) - 2.282 (1)

1.620 (2) - 1.904 (4)

3 MgxCu2-xP2O7

1.927 (3) - 2.282 (2)

1.495 (2) - 1.574 (1)

  1. 1 Inorganic Crystal Structure Database (ICSD) (2013).
  2. 2 MgxCu3-xV2O8 (0 ≤ x ≤ 3) and MgyCu2-yV2O7 (0 ≤ y ≤ 2) compositions prepared in this study.
  3. 3 (Tena 2012).