Why would a small amount of iron drastically change the color of quartz? (2.2)
What will be an ideal response?
Answer: The extremely small abundances of extra elements are insufficient to affect the properties shared by all specimens of quartz, such as density, luster, hardness, and cleavage. The presence of trace constituents, however, may affect color. Amethyst contains a tiny amount of iron, turning it purple. Therefore, chemical composition, within narrow ranges of variation, is another defining characteristic of individual minerals. It turns out that composition determines the physical properties of minerals. These properties are determined not only by which elements are present in each mineral, but also by how these elements combine with one another.
You might also like to view...
The primary resource located in the Persian Gulf is ____
a. iron b. diamonds c. oil d. coal e. gold
Permanent settlements existed prior to the beginning of recorded history around ________ years ago
A) 10,000 B) 1,000 C) 200,000 D) 24,000 E) 5,000
Explain the difference between a territorial sea and the Exclusive Economic Zone (EEZ)
What will be an ideal response?
The San Andreas fault near San Francisco
A. is locked and therefore accumulating stress. B. is not of much concern because it is seismically quiet. C. is not very dangerous because it only slips a few meters at a time. D. has been undergoing creep since the 1906 earthquake.