Mineralogy 2022

Minerals can be classified by crystal systems, which are organized by possible combinations of axis length and axis angles. There are ____ Crystal Systems.

• 6

• 7

• 8

• 10

What is a mineral?

• A mineral is a pure substance that is solid and has a specific gravity greater than 1 g/cm³

• A mineral is a crystalline substance in which atoms are arranged in a regularly repeating and orderly pattern (symmetry).

• A mineral is a naturally occurring compound found deep in the Earth's crust

What is the chemical formula for quartz

• Fe₂O₃

• SiO₂

• (Fe,Mn)AlSiO₃

• CaCO₃

Mica Group (muscovite and biotite) are _________ silicates.

• Framework

• Sheet

• Single Chain

• Isolated

The basic building block for all silicate minerals is ____

• Oxygen

• Silicon

• Silica Tetrahedron (SiO₄)

• Iron

___ T or F. Rocks made of several different minerals are also considered minerals

• True

• False

The crystal system that has three axes with equal length but in which none of the axes meet at a 90^o angle is ___________

• Cubic

• Trigonal or Rhombohedral

• Monoclinic

• Hexagonal

To be classified as a mineral, which of the following conditions must satisfied (check all that apply)

• It must be the byproduct of an organism.

• It cannot be synthetic

  (made by people)

• It must have a solid crystalline structure

• It must have a definite chemical composition.

__ T or F. Ice can be a mineral

• True

• False

Is cement a mineral?

• Yes

• No