Crystallography

Question 1

a periodic repetition of nodes in a systematic linear displacement

Answer 1

Translation

Question 2

specific length and direction of systematic displacement by which pattern repeats

Answer 2

Unit of translation vector

Question 3

Defined by two-unit translation vector

Answer 3

Two dimensional translation

Question 4

Two dimensional array of pattern nodes generated by two-dimension translation

Answer 4

Plane lattice

Question 5

a three dimensional array pattern of nodes generated by the two dimensional translation

Answer 5

Space lattice

Question 6

resulting array of motif of the crystalline substance

Answer 6

Crystal lattice

Question 7

It is how the substance arranged in a 3d form

Answer 7

Crystal lattice

Question 8

An imaginary line or axis where a pattern of nodes rotate around

Answer 8

Axis of rotation

Question 9

A form of symmetry in which the pattern is repeated by reflection through a mirror plane

Answer 9

REFLECTION

Question 10

an imaginary line or axis where a pattern of nodes rotate around

Answer 10

Mirror plane

Question 11

repetition of motifs by inverting them through a center called center of inversion

Answer 11

Inversion

Question 12

Point where the “image” of motif is inverted

Answer 12

Center of inversion

Question 13

combination of translation with reflection across a mirror plane producing a glide plane

Answer 13

Glide reflection

Question 14

imaginary plane where nodes glide into

Answer 14

Glide plane

Question 15

combination of translation with reflection across a mirror plane producing a glide plane

Answer 15

Rotoinversion

Question 16

combination of translation parallel to an axis with rotation about the axis

Answer 16

Screw rotation

Question 17

two dimensional motifs that are consistent with the generation of long range, two dimensional arrays

Answer 17

Plane point group

Question 18

a set of 17 plane lattice groups formed through the combination of the 10 plane points group and five unit meshes

Answer 18

Plane lattice groups

Question 19

Three-dimensional equivalents of two-dimensional equivalents plane point groups.

Answer 19

Space point groups

Question 20

A classification of minerals based on the relative measurement of their unit edges (a, b, and c), and the angles between them (a, B, and v).

Answer 20

Crystal system

Question 21

It takes every point in the shape and moves it to an equal distance on the opposite side

Answer 21

Inversion

Question 22

Combination of spinning around along the axis and turning inside out

Answer 22

Rotoinversion

Question 23

As it moves, it flips over the mirror plane

Answer 23

Glide reflection

Question 24

Twisting something while it pushing forward

Answer 24

Screw rotation