halides

Question 1

halite formula

Answer 1

NaCl

Question 2

halite form

Answer 2

• isometric, cubic habit
• other forms rare
• some hopper shaped (cube faces grown more at edge, center is depressed)
• also massive, granular, compact

Question 3

term for halites in crystals or granular crystalline masses showing cubic cleavage

Answer 3

rock salt

Question 4

halite cleavage

Answer 4

perfect cubic

Question 5

halide hardness

Answer 5

2.5

Question 6

halide specific gravity

Answer 6

2.16

Question 7

halide color

Answer 7

transparent translucent. colorless white
impure: shades of yellow blue purple red

Question 8

halide occurrence

Answer 8

• most commonly in evaporite deposits, associated with gypsum, anhydrite, dolomite, and shale
• in rock salt beds, few feet to several hundred feet
• valuable deposits in intrusive masses, which have their roots in thick, bedded deposits

Question 9

term for the intrusive masses with roots in thick bedded deposits for halites

Answer 9

salt domes

Question 10

commercial deposits for halites are confined mostly where

Answer 10

to the subsurface

Question 11

halite remarks

Answer 11

cubic cleavage and taste

Question 12

how to distinguish halite from sylvite

Answer 12

halite is less bitter and has yellow flame color

Question 13

why does halite have a yellow flame color

Answer 13

bc of sodium

Question 14

sylvite formula

Answer 14

KCl

Question 15

sylvite form

Answer 15

• isometric, cube octahedron in combination
• usually in granular crystalline masses with good cubic cleavage
• also compact

Question 16

sylvite cleavage

Answer 16

cubic perfect

Question 17

sylvite hardness

Answer 17

2

Question 18

sylvite specific gravity

Answer 18

1.99

Question 19

sylvite color

Answer 19

pure: transparent
colorless to white, shades of blue red yellow

Question 20

sylvite taste

Answer 20

salty and more bitter than halite

Question 21

sylvite occurrence

Answer 21

same with halite but rarer

Question 22

how to tell halite from sylvite

Answer 22

sylvite is more bitter and also sectile
also if you scratch both with a knife, halite powders but vv little with sylvite

Question 23

fluorite formula

Answer 23

CaF2

Question 24

fluorite form

Answer 24

• isometric, in cubes and often penetration twins
• other forms rare
• usually in crystal or cleavable masses
• also massive coarse fine granular, columnar

Question 25

fluorite cleavage

Answer 25

octahedral perfect

Question 26

fluorite hardness

Answer 26

4

Question 27

fluorite specific gravity

Answer 27

3.18

Question 28

fluorite color

Answer 28

• varies widely
• most commonly light green yellow, bluish green, or purple
• also colorless, white, rose, blue, or brown.
• Color is often distributed in bands in crystals or in the massive variety.
• May show fluorescence under ultraviolet radiation.

Question 29

fluorite occurrence

Answer 29

• common, widely distributed mineral
• veins chief mineral
• gangue mineral in metallic ores, especially those of lead and silver
• common in dolomites and limestones

Question 30

fluorite remarks

Answer 30

cubic crystals and perfect octahedral cleavage
vitreous luster and fine coloring, scratched with knife