For which of the following substances are the | vedclass

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Question

(A) In crystal systems,axial distances are equal when $a = b = c$. This condition is satisfied by the cubic crystal system. Among the given options,$B

Vedclass · Accepted Answer

Calcite $(CaCO_3)$

Vedclass · Answer

(A) In crystal systems,axial distances are equal when $a = b = c$. This condition is satisfied by the cubic crystal system. Among the given options,$BaSO_4$ (Barium sulfate) crystallizes in the orthorhombic system,while Calcite and Graphite have different axial ratios. However,in the context of standard textbook questions regarding axial distances,the question often refers to the cubic system. Since none of the options are cubic,we re-evaluate: $BaSO_4$ is orthorhombic $(a 
eq b 
eq c)$,Calcite is rhombohedral $(a = b = c)$,and Graphite is hexagonal. Thus,Calcite $(CaCO_3)$ is the correct answer as it belongs to the rhombohedral (trigonal) system where $a = b = c$.

For which of the following substances are the axial distances equal?

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