What is the effect of pressure on NaCl type crystals?
High pressure increases the co-ordination number from 6:6 to 8:8.
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A cubic solid is made of two elements Y and Z. Atoms of Z are at the corners of the cube and Y at the body centre. What is the formula of the compound?
Number of Z per unit cell = 1/8 x 8Z = 1 Z. Number of X per unit cell = 1 Y. Formula of the compound = ZY.
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In a crystal of zinc sulphide, zinc occupies tetrahedral voids. What is the coordination number of zinc?
The coordination number of zinc is 4.
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MgO has rock salt type structure. What is the co-ordination number of each ion?
The co-ordination number of each ion in MgO is six.
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