Inorganic · Solid State
Solid State: Unit Cells, Close Packing & Defects
Exam-focused revision notes on Solid State: Unit Cells, Close Packing & Defects for CSIR-NET Chemical Sciences, GATE Chemistry and IIT-JAM — the core concepts, the formulas worth memorising, the traps that cost marks, and a quick-recall table.
Counting atoms per unit cell
Each atom is shared between neighbouring cells according to its position: corner atoms count 1/8, face atoms 1/2, edge atoms 1/4 and body-centre atoms 1.
What this note covers
- 1Counting atoms per unit cell
- 2The cubic unit cells
- 3Close packing
- 4Ionic structures & radius ratio
- 5Point defects
- 6X-ray diffraction — Bragg's law
- 7Common traps students miss
- 830-second recall table
Read the full note
The remaining 7 sections — including the worked examples, the common-traps list and the quick-recall table — are part of ChemVidya Full Access, along with 6,000+ practice questions.
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