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Lab 1-ANS - Cleavage is identified by the number of planes...

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Lab 1 - ANSWERS Matter and Minerals: Mineral Identification 1. Fill out the mineral profile data sheet using these minerals. Mineral List: 1. Quartz 6. Calcite 2. Feldspar 7. Halite 3. Clay 8. Gypsum 4. Muscovite mica 9. Pyrite 5. Hematite 10. Chert/Flint 2. Give the complete definition of a “Mineral”: A mineral is a naturally occurring, inorganic, solid with an orderly internal structure and a definite chemical composition. 3. What is the difference between a crystal face and a cleavage plane? The crystal form is the external expression of a mineral that reflects the orderly internal arrangement of atoms. Whenever a mineral is permitted to form without space restrictions, it will develop individual crystals with well-formed crystal faces. Cleavage is the tendency of a mineral to break along planes of weaker atomic bonds.
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Unformatted text preview: Cleavage is identified by the number of planes and the angles at which the planes meet. 4. How do you know if the mineral in your hand is “Halite”? Halite will taste “salty”. 5. Which mineral “fizzes” when a drop of dilute HCl is applied to it? Calcite “fizzes” when HCl is applied to it. 6. List the 6 most common mineral-forming cations? 1. __ Sodium_ ________ 4. ____ Iron_ _________ 7. _____ Silicon ______ 2. ___ Potassium __________ 5. ____ Calcium _________ 3. ___ Magnesium __________ 6. ____ Aluminum __________ 7. The basic building block for silicate minerals (composed of 1 silicon and 4 oxygen ions) is called the: ____ Silica tetrahedra ____________...
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