Minerals envi sci buenavista
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• A naturally occurring substance of inorganic origin.
• Their molecular structures are regular and their chemical composition varies only within specific limits.
• A natural solid substance found in the earth’s crust.
• Substances that make up the rocks of Earth.
• They are HOMOGENOUS – every part of it is the same as every other part.
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PRINCIPAL GROUPS
• Native Elements
• Halides• Sulphides• Oxides• Carbonates• Sulphates• Phosphates• Silicates
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*Native Elements
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*Halides
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*Sulphides
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*Oxides
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*Carbonates
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*Sulphates
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*Phosphate
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*Silicate
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USES
• Sources of essential metals.–Ores: a natural occurring metallic
compound from which the metal can be extended.
• Used as catalysts or fluxes in chemical reactions.
• Some are of aesthetic value as collectors’ items or jewelry stones.
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PROPERTIES TO IDENTIFY A MINERAL
• Crystal Shape
• Luster–Metallic–Non-metallic
• Color• Streak• Hardness
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*Crystal Shape
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*Luster
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*Color
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*Streak
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*Hardness
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MINERALS THAT ARE PART OF A BALANCED DIET
• Iron – essential constituent of hemoglobin
• Calcium – for strong bones and teeth, and for muscle contraction
• Sodium – (salt) for the nerve cells and to produce hydrochloric acid for digestion
• Iodine – used to create thyroxine, hormone partly responsible for controlling metabolic rate in body
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Minerals composed of organic matter (crude oil, coal) are not true minerals but are called minerals.
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