Why do some minerals have a fixed chemical composition and some have a range of compositions?

Give an example of a mineral with a range of compositions. What will be an ideal response?


In many minerals, the chemical composition does not vary. In some minerals, one element can
substitute for another if the atoms of the two elements are nearly the same size and the same charge. In
olivine, magnesium and iron can both fill the cation position, so the chemical composition for the
mineral is (Mg, Fe) 2SiO4.

Environmental & Atmospheric Sciences

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One of the codons for histidine is 5'CAU3'. What is the anticodon for this codon?

A) 5'UAC3' B) 5'AUG3' C) 5'AUG3' D) 5'CAU3'

Environmental & Atmospheric Sciences

Historically, the United States and Canada as a culture region are sometimes called "Anglo America"

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

Explain the flow characteristics of a mountain glacier

What will be an ideal response?

Environmental & Atmospheric Sciences

Typically, the poor countries in the world today export primarily unprocessed raw materials

Indicate whether the statement is true or false.

Environmental & Atmospheric Sciences