1.

Which one of the following relationships is correct for cubic (C) and rhombohedral (R) unit cells ?

Answer»

`C a ne B ne c, alpha=beta=gamma `
`R:a=b=c,alpha=beta=gamma=90^(@)`
`C a = b =c, alpha ne beta ne gamma `
`R:a ne b ne c,alpha=beta=gamma=90^(@)`
`C a =b = c, alpha=beta=gamma `
`R:a=b ne c,alpha= beta=gamma=90^(@)`
`C a =b = c, alpha=beta=gamma `
`R:a=b ne c,alpha= beta=gamma ne 90^(@)`

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