7: Solid state chemistry

Question 1

what are the 3 crystal systems with right angles called?

Answer 1

cubic, tetragonal, and orthorhombic

Question 2

what are the 4 crystal systems without right angles called?

Answer 2

rhombohedral, hexagonal, monoclinic, and triclinic

Question 3

describe cubic crystal system…

Answer 3

cubic - with three sides of equal length (all angles right angles)

Question 4

describe tetragonal crystal system…

Answer 4

tetragonal - with two sides of equal length (all angles right angles)

Question 5

describe orthorhombic crystal system…

Answer 5

orthorhombic - with all sides of unequal length (all angles right angles)

Question 6

describe rhombohedral crystal system…

Answer 6

rhombohedral - pulling a cubic structure at opposite corners (the sides remain all equal length, and the angles are all the same but not right angles)

Question 7

describe hexagonal crystal system…

Answer 7

hexagonal - two opposite edges of a tetragonal system are pushed towards one another until the angles are 60° and 120°

Question 8

describe monoclinic crystal system…

Answer 8

monoclinic - orthorhombic is pushed over in one direction so one angle is no longer 90°

Question 9

describe the triclinic crystal system…

Answer 9

triclinic system - this has no equal angles and no sides equal