MINERALS. http://sciencespot.net/Media/mghtmincl.gif. Mineral Composition. • Minerals are made of elements Elements are made up of atoms Atoms are the basic building blocks of all matter. They are invisible Atoms are organized on the Periodic Table of Elements. Atoms.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
• Minerals are made of elements
- evaporation of water leaves the mineral behind- precipitate
3. Pressure and Temperature
- causes atoms to rearrange and form new minerals
4. Hydrothermal solutions
-mineral formation from hot mixtures.
contain silicon and oxygen, the two most common elements in Earth’s crust
- make up 90% of all minerals
-common silicates: feldspar, quartz
-do not contain a combination of silicon & oxygen
Contain silicon and oxygen; olivine, mica, feldspar, quartz
Contain Sulfur; gypsum, galena, pyrite
Contain a halogen – From Group 17; halite (NaCl)
Contain only one type of atom or element; gold, silver, copper
Contain O and one or more other elements, Usually a metal; hematite
Contain C, O and one or more other metallic elements; calcite, dolomite
The same mineral may exhibit many different colors
Ex: Quartz rose/purple/smoky/clear
NOT a good mineral identifier
your fingernail (hardness is approx. 2.5)
a copper penny (hardness is approx. 3.0)
a steel knife blade (hardness is approx. 5.5)
glass (hardness is approx. 6.0)
Cleavage of BiotiteMica: one-directional
Rhombic Cleavage of Calcite: (3-directions)
Cubic Cleavage of Halite: 3-directions
Acid TestCalcite reacts with dilute hydrochloric acid
Halite tastes like salt.
Double Refractionexample = Calcite
Graphite has a greasy feel.
Sulfur – strong smell
- Economic and manufacturing resources