Minerals
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Naturally occurring chemical elements Inorganic compound Homogeneous solid Definite chemical composition Organized internal structure
MINERALS
PHYSICAL PROPERTIES OF MINERALS
• Color and Streak • Hardness • Cleavage and Fracture • Luster • Habit
Enumerate the different mineral groups
SILICATES OXIDES SULFIDES SULFATES NATIVE ELEMENTS HALIDES CARBONATES PHOSPHATES
PHYSICAL PROPERTIES OF MINERALS -most obvious property of a mineral -it can be unreliable because of the presence of impurities and imperfections
Color
PHYSICAL PROPERTIES OF MINERALS -color of a mineral in the powder form -more reliable than color
Streak
Mohs Hardness Scale is developed by…?
Friedrich Mohs
PHYSICAL PROPERTIES OF MINERALS • where a smooth break results to flat crystal face
Cleavage
PHYSICAL PROPERTIES OF MINERALS -refers to rough or irregular surfaces along which the mineral breaks randomly
Fracture
PHYSICAL PROPERTIES OF MINERALS -specifies how much of the mineral reflects light
Luster
PHYSICAL PROPERTIES OF MINERALS • term used to describe general shape of a crystal.
Habit
PHYSICAL PROPERTIES OF MINERALS • what mineral is the softest?
Talc
PHYSICAL PROPERTIES OF MINERALS -what mineral is the hardest?
Diamond
PHYSICAL PROPERTIES OF MINERALS -cleavage in one direction
Muscovite
PHYSICAL PROPERTIES OF MINERALS -cleavage in two directions
Feldspar
PHYSICAL PROPERTIES OF MINERALS -cleavage in three directions
Halite
PHYSICAL PROPERTIES OF MINERALS -cleavage in four directions
Calcite
PHYSICAL PROPERTIES OF MINERALS -minerals which are solid and reflect light. -example of luster
Pyrite Metallic Luster and Diamond Adamantine
PHYSICAL PROPERTIES OF MINERALS -minerals which look like a broken glass. -example of luster
Sphalerite Vitreous
DIFFERENT MINERAL GROUPS -most commonly found group -they have silicon and oxygen -it includes quartz
SILICATE MINERALS
DIFFERENT MINERAL GROUPS -it has oxygen
Oxides
DIFFERENT MINERAL GROUPS -it has sulfur and S^2-
Sulfates
DIFFERENT MINERAL GROUPS -it has halogens
Halides
DIFFERENT MINERAL GROUPS -it has carbon - CO3^2-
Carbonates
DIFFERENT MINERAL GROUPS -it has phosphorus -PO4^3-
Phosphates