General Face Centered Cubic e.g. NaCI, KCI, MgO,PbS etcUNIT CELLsUnit cell5.63 A> contains 4 NaCI units> edge = 5.63 A (via Xray) = 5.63 x 10“ cmVolume unit cell, (NaCl)4 = .1.78 x 10-24 cc6.02 x 1023 ccO 6.0x 10-24 cc1.78 x 10 22 cc

edge or side = 5.63 x 10-8 volume = (side/or edge )3 volume =(5.63 x 10-8)3 =1.78x 10-22

General Face Centered Cubic e.g. NaCl, KCI, MgO, PbS etc UNIT CELL Na Unit cell 5.63 A N 0U0 > contains 4 Naci units > edge = 5.63 A (via Xray) = 5.63 x 10“ cm Volume unit cell, (NaCl)4 O1.78 x 1024 cc O 6.02 x 1023 cc 6.0x 10 24 cc 1.78 x 10 22 cc

General Face Centered Cubic e.g. NaCl, KCI, MgO, PbS etc UNIT CELL Na Unit cell 5.63 A N 0U0 > contains 4 Naci units > edge = 5.63 A (via Xray) = 5.63 x 10“ cm Volume unit cell, (NaCl)4 O1.78 x 1024 cc O 6.02 x 1023 cc 6.0x 10 24 cc 1.78 x 10 22 cc

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter21: The Solid State: Crystals

Section: Chapter Questions

Problem 21.36E: The first two signals from a powdered sample has X rays (=1.47742A) diffracted at angles of 13.48...

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Concept explainers

Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.

Question

General Face Centered Cubic e.g. NaCI, KCI, MgO,
PbS etc
UNIT CELL
s
Unit cell
5.63 A
> contains 4 NaCI units
> edge = 5.63 A (via Xray) = 5.63 x 10“ cm
Volume unit cell, (NaCl)4 = .
1.78 x 10-24 cc
6.02 x 1023 cc
O 6.0x 10-24 cc
1.78 x 10 22 cc

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