Question

Which salt crystallises in Rhombohedral crystalline structure?
O Caco (Calcite)
O KNO,
O Na S04 10 H,O
O K₂Cr₂O,​

Answer 1

Answer:

$\huge\fbox\red{A}\fbox\pink{n}\fbox\purple{S}\fbox\green{w}\fbox\blue{E}\fbox\orange{r}$

In crystallography, the hexagonal crystal family is one of the six crystal families, which includes two crystal systems (hexagonal and trigonal) and two lattice systems (hexagonal and rhombohedral). While commonly confused, the trigonal crystal system and the rhombohedral lattice system are not equivalent (see section crystal systems below).[1] In particular, there are crystals with trigonal symmetry but belong to the hexagonal lattice (such as α-Quartz).