Mineralogy

Question 1

Mohs Scale, 1-10

Answer 1

Talc, gypsum, calcite, flourite, apatite, orthoclase, quartz, topaz, corrundum, diamond

Question 2

Diaphaneity

Answer 2

Mineral transmits light

Question 3

Asterism

Answer 3

Inclusions of tiny parallel slender fibers, refraction

Question 4

Pleochroism

Answer 4

Different colors at different angles

Question 5

Chatoyancy

Answer 5

Light reflection from luminous band

Question 6

The law of the constancy of interfacial angles

Answer 6

The angles between the crystal faces of a given species are constant, whatever the lateral extension of these faces and the origin of the crystal, and are characteristic of that species.

Question 7

Unit cell

Answer 7

The smallest subset of the lattice that still retains all of the physical, chemical, and symmetry properites of the mineral.

Question 8

Isometric

Answer 8

The crystallographic axes used in this system are of equal length and are mutually perpendicular, occurring at right angles to one another.

Question 9

Tetragonal

Answer 9

The tetragonal system also has three axes that all meet at 90º. C shortest

Question 10

Orthorhomic

Answer 10

All three bases intersect at 90° angles, a=b X c

Question 11

Hexagonal

Answer 11

The C or vertical axis is at 90º to the shorter axes, a X b X c. 90/90/120

Question 12

Triclinic

Answer 12

In the triclinic system, all the axes are different lengths. None of them meet at 90º B/a/y

Question 13

Quartz

Answer 13

SiO2 Hexagonal 1

Question 14

Orthoclase

Answer 14

KAlSi3O8 Monoclinic 2

Question 15

Albite

Answer 15

NaAlSi3O8 Monoclinic/Triclinic 3

Question 16

Anorthite

Answer 16

CaAlSi3O8 Triclinic 4

Question 17

Muscovite

Answer 17

KAl2(AlSi3O10)(OH)2 Monoclinic 5

Question 18

Biotite

Answer 18

K(Mg,Fe)3(AlSi3O10)(OH)2 Monoclinic 6

Question 19

Amphibole

Answer 19

(Ca,Mg,Fe)7Si8O22)(OH)2 Monoclinic 7

Question 20

Pyroxene

Answer 20

(Ca,Mg,Fe)2Si2O4 Orthorhombic/Monoclinic 8

Question 21

Olivines

Answer 21

(Mg,Fe)2SiO4 Orthorhombic 9

Question 22

Calcite

Answer 22

CaCO3 Hexagonal 10

Question 23

Crust

Answer 23

Oxygen, Silicon, Aluminum

Question 24

Upper Mantle

Answer 24

Silicon, oxygen, magnesium, and iron. Olivines and pyroxenes

Question 25

Lower Mantle

Answer 25

Iron, magnesium, and silicates

Question 26

Outer Core

Answer 26

Iron and nickel

Question 27

Inner Core

Answer 27

Fe, Ni

Question 28

Radius Ratio, why care?

Answer 28

Radius ratio is the ratio of radius of the cation to the radius of the anion. We care because larger anions can have more cations, then determines the coordination.

Question 29

Orthopyroxene

Answer 29

Fe, Mg

Question 30

Clinopyroxene

Answer 30

Ca,

Question 31

Silicates are classified by

Answer 31

arrangement of silicate tetrahedra, Neo, Soro, Cyclo, Chain single and double, hydro, Phyllo, and Tecto

Question 32

Neosilicates

Answer 32

1:4 Si:O each tetrahedron is isolated