sir in types of unit cell we studied it can be of 4 types i.e primitive, face centred, body centred and end centred, but while studing 3D close packing it was told that it can be of 3 types i,e. simple(primitive) cubic unit cell, hcp and ccp. but i am not able  to understand that hcp is a type of unit cell or it is one of the 7 crystal system or somthing else?and if it is type of unit cell then why it is not taught under the topic types of unit cell. and if it is a crystal system then what about

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How will derive the formula of density of a unit cell ?... | Filo

SOLVED: A hypothetical AX type of ceramic material is known to have a density of 3.55 g/cm³ and a unit cell of cubic symmetry with a cell edge length of 0.62 nm. The atomic weights of the A and X elements are 90.5 and 37.3 g/mol, respectively. On the basis of this information, which one of the following crystal structures is possible for this material?O fluorite O zincblende O cesium chloride

Crystal Lattices & Unit Cell - Differences, Types, Videos & Examples