Silicates (ma'am mylene ver)

Question 1

More than 2/3 of the Earth’s crust is composed of these minerals.

Answer 1

framework silicate minerals

Question 2

A High-pressure, low-temperature polymorph of Quartz

Answer 2

Stishovite

Question 3

A polymorph of Quartz exists in high to medium pressure and a wide variety of temperatures.

Answer 3

Coesite

Question 4

A polymorph of Quartz exists in low temp and low pressure

Answer 4

Alpha-Quartz

Question 5

A respiratory illness caused by inhaling unsafe levels of silica dust.

Answer 5

Silicosis

Question 6

Uses of quartz

Answer 6

Raw materials for making glass
Semiconductor
Sealant
Abrasive/polish
Semiprecious stone (Jewelry)

Question 7

violet or purple quartz

Answer 7

Amethyst

Question 8

cause of the purple color of amethyst

Answer 8

due to the trace amount of Fe

Question 9

pink or rose red variety of Quartz

Answer 9

Rose Quartz

Question 10

cause of the pink or rose-red color of Quartz

Answer 10

uncertain but some rose quartz contains very fine inclusions of pink dumortierite

Question 11

cause of the yellow color of the Quartz

Answer 11

fe content, irradiation, or some combination

Question 12

yellow Quartz

Answer 12

Citrine

Question 13

cause of the milky color of Quartz

Answer 13

abundant minute fluid inclusions

Question 14

A red or brown microcrystalline variety of quartz

Answer 14

Jasper

Question 15

A black or dark gray microcrystalline quartz

Answer 15

Flint

Question 16

smoky brown of black quartz

Answer 16

Smoky quartz

Question 17

cause of the smoky brown color of Quartz

Answer 17

produced by irradiation of quartz containing trace amounts of Al.

Question 18

Most abundant minerals in the earth’s crust.

Answer 18

FELDSPAR GROUP

Question 19

FELDSPAR GROUP is nearly found in what type of rock?

Answer 19

igneous rock

Question 20

three principal compositional end members of the Feldspar group.

Answer 20

Alkali feldspars (K,Na)AlSi3O8/ K-feldspar (KAlSi3O8) (Orthoclase)
Albite (NaAlSi3O8)
Anorthite (CaAl2, Si2O8)

Question 21

the 6 minerals in the plagioclase group

Answer 21

Albite An0- An10
Oligoclase An10-An30
Andesine An30-An50
Labradorite An50 – An70
Bytownite An70-An90
Anorthite An 90-An100

Question 22

Microcline

Answer 22

triclinic K-feldspar

Question 23

Orthoclase

Answer 23

monoclinic K-feldspar

Question 24

Low Sanidine

Answer 24

monoclinic K-feldspar

Question 25

high Sanidine

Answer 25

monoclinic K-feldspar

Question 26

K-feldspar produced by authigenic or low-temperature hydrothermal processes

Answer 26

Adularia

Question 27

triclinic sodic alkali feldspar characterized by grid twinning

Answer 27

Anorthoclase

Question 28

Similar to feldspars in both structure and physical properties but distinguishable chemically from feldspars by having less silica relative to the amount of Na and K.

Answer 28

FELDSPHATOIDS

Question 29

Mineral under feldspathoids

Answer 29

Nepheline, Leucite Sodalite group

Question 30

hydrated framework silicates

Answer 30

Zeolite Group

Question 31

The largest single group of silicate minerals constitute major rock-forming minerals in some environments

Answer 31

Zeolite Group

Question 32

produced by the alteration of some precursor minerals

Answer 32

Zeolite group

Question 33

Environments favorable for minerals under the zeolite group

Answer 33

Weathering under high pH conditions Sedimentary diagenesis environments Alteration associated with percolating groundwater Hydrothermal alteration associated with igneous activity Contact metamorphism Burial and low-grade regional metamorphism

Question 34

a mineral group that has a general formula of General Formula: XYZ2O6

Answer 34

Pyroxene group

Question 35

Constructed of single chains of tetrahedra.

Answer 35

Pyroxene group

Question 36

color of Orthopyroxenes and pigeonite

Answer 36

brown

Question 37

usually restricted to volcanic rocks

Answer 37

pigeonite

Question 38

Most of many members with platy or flaky habits and one prominent cleavage. They are generally soft, relatively low specific gravity

Answer 38

Phyllosilicates

Question 39

chief minerals of schists and are widespread in igneous rocks

Answer 39

MIca

Question 40

Form at lower temperatures than amphiboles or pyroxenes and frequently are formed as replacements of earlier minerals as a result of hydrothermal alteration

Answer 40

Phyllosilicates (sheet silicates)

Question 41

which contain rings of linked SiO4 tetrahedra

Answer 41

Ring Silicates (cyclosilicates)

Question 42

3 common species of ring silicates

Answer 42

Beryl Cordierite Tourmaline

Question 43

Most abundant in the pyroxene group

Answer 43

Augite

Question 44

Most common pyroxenes in igneous rocks (intermediate to mafic)

Answer 44

augite, pigeonite, and orthopyroxene

Question 45

The mixture of enstatite and ferrosilite

Answer 45

Orthopyroxene

Question 46

The mixture of diopside and hedenbergite

Answer 46

Clinopyroxene

Question 47

generic term for the mixture of Mg2Si2O6 and Fe2Si2O6

Answer 47

Hypersthene

Question 48

generic term for the mixture of CaMg2Si2O6 and ((Ca,Fe)2Si2O6)

Answer 48

Augite

Question 49

In terms of abundance, these minerals are among the most common minerals, in basaltic and related rocks in the oceanic crust

Answer 49

pyroxene

Question 50

very common minerals in wide variety of igneous and metamorphic rocks

Answer 50

Amphibole