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a natural, inorganic solid that has characteristics of chemical composition, an orderly internal structure.
What is an inorganic substance?
one that is not made up of living things or the remains of living things.
Which of the following is a question scientist ask to determine if a substance is a mineral?
does the substance occur naturally?
Why is obsidian not a mineral?
the atoms are not arranged in a regularly repeating crystalline structure.
what is the fourth question scientists ask to determine if a substance is a mineral?
Does it have a consistent chemical composition?
determines what type of feldspar will form
depends on which metal combines with silicon and oxygen atoms.
6 major groups of non silicate minerals
carbonates,halides, native elements, oxides, sulfates, sulfides
crystal is a solid whose atoms, ions, or molecules are arranged on a regular, repeating pattern
as a result of the conditions under which minerals form, minerals are commonly made up of
masses of crystals that are so small, you can see them only with a microscope.
if a crystal forms where the surrounding material is not restrictive, how will the mineral develop?
as a single, large crystal that has one of 6 basic crystal shapes.
what does each building block of the crystalline structure if silicate minerals have?
4 oxyge atoms arranged in a pyramid with one silicon atom in the center
how many sides does the basic building block of the crystalline structure of silicate minerals have?
what is the basic building bloc of the crystalline structure of silicate minerals called?
what is true of silicon-oxygen tetrahedra?
they combine in different arrangements to form different silicates
the various arrangements of the silicon-oxygen tetrahedra are a result of
the kinds of bonds that form between the oxygen atoms of the tetrahedra and other atoms
the oxygen and silicon atoms of the tetrahedra may bond with
atoms of neighboring tetrahedra, and bonds may form between the oxygen atoms and other elements outside the tetrahedra
why do non silicate minerals show a variety of crystalline structures?
because non silicate minerals have diverse chemical positions
what are common crystal structures for non silicate minerals
cubes, hexagonal prisms, irregular masses
how can classes of non silicate minerals be divided into smaller groups?
based on the structural similarities of the mineral's crystals
native elements have very high densities because
their crystal structures are based on the packing of atoms as close together as possible
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