Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Mineralogy > Final Exam/ Lecture Exam 2 > Flashcards

Final Exam/ Lecture Exam 2 Flashcards

1
Q
  1. Space symmetry refers to:
    a. rotation about and axis
    b. reflection by a mirror
    c. inversion through a point
    d. repetition of a pattern due to translation
    e. all of the above
A

D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q
  1. The most important consideration in choosing a unit cell is:
    a. simplicity, i.e. it must be primitive
    b. it must have the same symmetry as the lattice
    c. convenience, i.e., must be easy to see the repeat pattern
    d. it must be motif neutral
A

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q
  1. Which crystal system is characterized by three crystallographic axes of different lengths, and the angles between them (a, B, and Y) all equal to 90°?
    a. Monoclinic
    b. Tetragonal
    c. Isometric
    d. Orthorhombic
A

D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q
  1. Which of the following shapes can be used for 2-D unit cells?
    a. square
    b. rhombohedron
    c. pentagon
    d. all of the above
    e. both a and b
A

E

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q
  1. A screw axis represents a combination of:
    a. translation + reflection
    b. rotation + glide plane
    c. translation + rotation.
    d. inversion + reflection
A

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q
  1. “Bravais lattice” refers to:
    a. the 14 possible distinctly different space lattices
    b. the 32 possible distinctly different point groups
    c. the six possible distinctly different crystal systems
    d. the six possible distinctly different point groups
A

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q
  1. How are point groups are related to crystal systems:
    a. each of the six point groups designates a different crystal system
    b. each of the 32 point groups belongs to one of six crystal systems
    c. each of the 32 crystal systems belongs to one of six point groups
    d. point groups are another term for space groups
A

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q
  1. Space group designation includes:
    a. lattice type
    b. point group symbols
    c. screw axes/ glide plane symbols
    d. all of the above
A

D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q
  1. Which of the following crystal systems have crystallographic axes unit lengths that are all the same?
    a. cubic
    b. tetragonal
    c. orthorhombic
    d. all of the above
A

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q
  1. Which of the following crystal systems have only one crystallographic axes angle that is not 90°?:
    a. cubic
    b. orthorhombic
    c. monoclinic
    d. triclinic
A

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q
  1. Which of the following coordinates specifies a point lying within a plane containing 2 crystallographic axes?
    a. uv0
    b. 00w
    C. uvw
    d. 000
A

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q
  1. Which of the following indices specifies a line with an end-point that is 1/3a, 1b, 2/3c?
    a. [112]
    b. (112)
    c. [132]
    d. (132)
A

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q
  1. Which of the following indices specifies a line that lies within the a b plane?
    a. [110]
    b. [001]
    c. (110)
    d. (001)
A

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q
  1. What are the Miller indices for a crystal face with parameters of 1a, 2b, and 2/3c?
    a. (362)
    b. {213}
    c. [362]
    d. (213)
A

D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q
  1. Which form(s) is (are) symbolized as (111)?
    a. tetrahedron and cube
    b. octahedron and cube
    c. tetrahedron and octahedron
    d. cube
A

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q
  1. In the diagram to the right which zone do the shaded faces belong?
    а. [100]
    b. (100)
    c. [010]
    d. (010)
A

A

17
Q
  1. In the diagram to the right which zone do the unshaded faces belong?
    a. [100]
    b. (100)
    c. [010]
    d. (010)
A

C

18
Q
  1. How many anions surround a cation in cubic coordination?
    a. four
    b. six
    c. eight
    d. twelve
A

C

19
Q
  1. As we move to the right within the 3rd row of the periodic chart (i.e., Na, Mg, Al, Si, P) what happens to the charge and ionic radius of the cations
    a. charge and radius increase
    b. charge and radius decrease
    c. charge stays the same, radius increases
    d. charge increases, radius decreases
A

D

20
Q
  1. As we move down the 1st column of the periodic chart (i.e., Li, Na, K, Rb, Cs) what happens to the charge and ionic radius of the cations
    a. charge and radius increase
    b. charge and radius decrease
    c. charge stays the same, radius increases
    d. charge increases, radius decreases
A

C

21
Q
  1. Why does halite (NaCI) dissolve more easily in water than pericase (MgO)?: Mg have a
    a. Mg bonds to fewer O than Na does to CI so Mg-O bonds are stronger
    b. Mg bonds to more O than Na does to CI so Mg-O bonds are stronger
    c. Mg and O ions are have a higher charge than Na and CI so Mg-O bond are stronger
    d. Mg and O ions are have a lower charge than Na and CI so Mg-O bond are stronger
A

C

22
Q
  1. According to Pauling’s 1st rule, small cations:
    a. tend to have lower coordination numbers than large cations
    b. tend to have higher coordination numbers than large cations
    c. tend to form weaker bonds than large cations
    d. tend to form metallic bonds
A

A

23
Q
  1. According to Pauling’s 2nd rule, the sum of the bonds to an ion:
    a. is always greater than the coordination number
    b. is always less than the coordination number
    c. is always greater than the charge
    d. equals the charge
A

D

24
Q
  1. An anisodesmic compound:
    a. is one in which all bonds are the same strength
    b. is one in which optical properties are the same in all directions
    c. is one which contains bonds of differing strengths
    d. is one in which optical properties are different in different directions
A

C

25
Q
  1. A mesodesmic compound:
    a. is one in which cation-anion strength equals half of its charge
    b. cannot form polymers
    c. is one in which anions can only coordinate with one cation
    d. all of the above
A

A

26
Q
  1. Which of these compounds or anionic groups is mesodesmic?:
    a. (CO3)2-
    b. (SiO4)4-
    c. (SO4)2-
    d. all of the above
A

B

27
Q
  1. Which of these silicate subgroups has the highest number of shared oxygens between silica tetrahedra?:
    a. island silicates
    b. sheet silicates
    c. framework silicates
    d. chain silicates
A

C

28
Q
  1. When light is passed from a medium of low refractive index to one of high refractive index, the light is:
    a. reflected away from the normal
    b. refracted toward the normal
    c. refracted away from the normal
    d. absorbed
A

B

29
Q
  1. The difference between isotropic and anisotropic substances is that:
    a. isotropic substances do not refract light
    b. anisotropic substances reflect only light of shorter wavelengths
    c. light ravs passing through an isotopic substance travel at two different velocities
    d. light rays passing through an isotropic substance will not be split into two rays
A

D

30
Q
  1. The difference in refractive indices of light rays moving through an anisotropic mineral is called:
    a. relief
    b. pleochroism
    c. optic sign
    d. birefringence
A

D

31
Q
  1. The wavelength of light (1) can be calculated by:
    a. multiplying the velocity (v) by the frequency (U)
    b. dividing the velocity (v) by the frequency (U)
    c. multiplying the amplitude (h) by the velocity (v)
    d. dividing the amplitude (h) by the frequency (U)
A

B

32
Q
  1. Polarized light can be produced by:
    a. reflection
    b. double refraction
    c. absorption
    d. all of the above
A

C

33
Q
  1. Which of the following statements about ordinary and extraordinary rays is correct?
    a.they travel slightly different paths through a mineral
    b. they vibrate perpendicular to each other
    c. they have slightly different velocities
    d. all of the above
A

D

34
Q
  1. Which of the following is observed with the upper polarizer OUT of the light path?
    a. birefringence
    b. interference figures
    c. isogyres
    d. pleochroism
A

B

35
Q
  1. The accessory plate (e.g., the gypsum plate) is used to determine:
    a. optical sign (+ or -).
    b. pleochroism
    c. birefringence.
    d. relief
A

A

Mineralogy (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions