It is naturally occurring, inorganic. It is also a crystalline substance, and has definite atomic structure

(a)  

Give the two classifications of minerals

(a)  

Minerals found in abundance of earth crust and forms igneous, sedimentary, or metamorphic rocks

(a)  

Has economic value, limited mode of occurrence and formed with unusual process

(a)  

how many minerals exist in earth crust?

(a)  

All minerals are composed of what elements?

(a)  

What are the eight mineral groups?

(a)  

What are the physical properties of minerals?

(a)  

Not constant in most of the minerals. This is due to the stain or impurities in the minerals

(a)  

Development of series of prismatic colors by turning about in light

(a)  

Similar to play of colors but slower rotation

(a)  

Show rainbow colors either in the interior or on the surface

(a)  

* Color of mineral powder

* Nearly constant than color

* Determined by marking unglazed porcelains or simply scratching with a knife and observing the powder color

(a)  

how much a mineral reflects light

(a)  

Under lustre, we have two:

(a)  

Metallic is _______ while Nonmetallic is ______.

(a)  

denote the shape and form of minerals

(a)  

Types of structure and form

(a)  

thick or thin column-like structure

(a)  

blade like structure

(a)  

fibrous diverging from central points

(a)  

made of separable plates

(a)  

an aggregate-like bunch of grapes

(a)  

kidney shaped aggregrate

(a)  

Resistance of minerals to abrasion or scratching

(a)  

rank the gemstones according to MOHS SCALE OF HARDNESS

(a)  

the density of the mineral compared to the density of water

(a)  

tendency of a crystallized mineral to break along certain definite planes yielding more or less smooth surfaces

(a)  

defined as the appearance of its broken surface

(a)  

types of fracture

(a)  

concentric rings or curved surface

(a)  

smooth and flat

(a)  

irregular surface

(a)  

breaks with a rough

(a)  

Behavior of mineral when deformed or broken

(a)  

types of TENACITY

(a)  

Minerals may be cut with a knife

(a)  

The mineral may be pounded out into thin sheets

(a)  

The mineral breaks or powders easily

(a)  

Regains former shape as pressure is released

(a)  

Mineral may be drawn into a wire

(a)  

Mineral will not go back to original position when released

(a)  

the science concerned with the

formation, properties, and

structure of crystals

(a)  

also called Mineral Habits

refers to the way crystals form within a specific mineral

(a)  

two pyramids attached at their bases

(a)  

has six sides

(a)  

internal atomic arrangement of

mineral manifested outwardly

by development of geometrical

shapes or crystal characters

(a)  

3 TYPES OF FORMS

(a)  

mineral occurs in the form of well

defined crystals

(a)  

shows absolutely no signs or

evidence of crystallization

(a)  

well-defined crystals are absent

but a tendency towards

crystallization is present

(a)  

§Describes the repetition of structural features

(a)  

2 GENERAL TYPES OF SYMMETRY

(a)  

Periodic repitition of structural feature across a

length or through an area or volume

(a)  

Periodic repetition of structural feature at a

point

(a)  

Directly related to translational symmetry

(a)  

In Bravais Lattice, there are (a)   different lattices

In Bravais Lattice, there are (a)   crystal systems

What are the three types of Bravais Lattice?

(a)  

Give the 6 crystal systems

(a)  

three factors that define the crystal systems

(a)  

Set of faces that are geometrically equivalent and

whose spatial positions are related to one another

according to symmetry

(a)  

Give the 11 crystal forms

(a)  

  “pedion”

  Single face

     No repeated symmetry

     Example: Triclinic system

(a)  

“pinacoid”

Two geometrically equivalent faces

(a)  

"dome” if faces are reflected

Sphenoid if related by rotation

Two nonparallel geometrically equivalent faces

(a)  

Orthorhombic and Tetragonal crystal systems

  Set of nonparallel geometric equivalent faces

(a)  

3,4,6,8,12 sets of geometrically equivalent faces parallel to the same axis

(a)  

    3,4,6,8,12 faces not parallel but intersects at a point

(a)  

tetragonal and hexagonal crystals systems produce pyramids

(a)  

2 pyramids connected at

bases

(a)  

Passes 6,8,12 trapezoidal faces

Produced by tetragonal and hexagonal system

(a)  

Consist of 8 or 12 faces

each with scalene triangle

(a)  

Consist of 6 rhombus shaped faces

Resembles a cube in appearance positioned upright on one corner

(a)  

Composed of 4 triangular faces

(a)  

3 axes of equal length

Angles intersect at 90 degrees

(a)  

Isometric systems is also called (a)   and has the highest degree of symmetry

  3 axes

Axis C is longer, Axis A and B are equal in length

Angles intersect at 90 degrees

(a)  

3 axes

All Axes are different length

Angles intersect at 90 degrees

(a)  

  3 axes

  Different lengths

Axis A and C may intersect at 90 degrees

   Axis B intersects at an oblique angle

(a)  

3 axes

Different lengths

Angles intersect at Oblique angles

(a)  

  4 axes

3 axes are equal in length (A,B,D)

C is the longest

Intersect at 120 degrees

     C intersects with other axes at 90 degrees

(a)