The minerals andalusite, sillimanite, and kyanite all have the chemical formula, Al2SiO5. Explain how three different minerals can have the same chemical components and why this fact is important
Even thought andalusite, sillimanite, and kyanite have the same chemical formula, they differ in crystal structure and other physical properties because each forms under a different range of pressures and temperatures and is thus reflective of a different metamorphic grade. For this reason, they are useful index minerals for metamorphic rocks that formed from clay-rich rocks.
You might also like to view...
What is often found in the middle of manganese nodules?
a. Microtektites b. Shark teeth or bone fragments c. Living bacteria d. Sand grains
Control of bedbugs is difficult because their habitat includes
A) lawns and gardens frequented by people and pets. B) cats and dogs and then transfers to human hosts. C) human bedding, cracks in bed frames, and nearby household objects. D) forested and brushy environments.
Which of the following aqueous solutions of Na2SO4 is isotonic with a 0.15 M NaCl solution?
A) 0.05 M B) 0.10 M C) 0.15 M D) none of these
________ ______ _______ are individuals who are dislodged and impoverished by strife in their home country but have little prospect of emigrating
Fill in the blank(s) with correct word