Plane Lattices in Two Dimensions

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What is the term used to describe the four fundamentally different shapes in plane lattices?

Space lattices

Crystal axes

Unit meshes (correct)

Lattice nodes

Which type of unit mesh is found in the diamond plane lattice?

Regular

Centered (c) (correct)

Primitive (p)

Irregular

What is the angle between the unit mesh axes labeled a and b?

$120^{\ ext{o}}$

$45^{\ ext{o}}$

$90^{\circ}$ (correct)

$60^{\ ext{o}}$

If lattice nodes are repeated in all three dimensions, what structure is formed?

Space lattice Signup and view all the answers

What is the term used for the volume outlined by lattice nodes in a space lattice?

Unit cell Signup and view all the answers

In crystallography, which of the following intersects at a point called the origin?

Crystal axes Signup and view all the answers

Which crystal system is identified by having lattice nodes only at the corners of the unit cell?

Triclinic Signup and view all the answers

What type of symmetry operation deals with repeating motifs about a point?

Rotation Signup and view all the answers

In which unit cell shape are lattice nodes found on the corners and at the center of each face?

Cubic Signup and view all the answers

What are the three types of symmetry operations in crystallography?

Reflection, Rotation, Translation Signup and view all the answers

Which crystal system is identified by having an additional lattice node at the center of the unit cell?

Isometric Signup and view all the answers

What do side-centered (C) unit cells contain in terms of lattice nodes?

At the corners and on two opposite sides Signup and view all the answers

What term is used to describe well-formed crystal faces?

Euhedral Signup and view all the answers

Which crystal system has a total of 15 different forms possible?

Isometric Signup and view all the answers

What term is used to describe crystals with length, width, and height that are about the same?

Equant Signup and view all the answers

Which crystal habit term is used for crystals that are roughly book-shaped?

Tabular Signup and view all the answers

In crystallography, which term is used for crystals that are thin and elongate like a knife blade?

Bladed Signup and view all the answers

In which crystal system do the crystal forms consist of pedions, pinacoids, prisms, and pyramids?

Orthorhombic Signup and view all the answers