Geology Flashcards - SO FAR

What is the formula of quartz?

SiO_²

What is the formula of alkali feldspar?

(K,Na)AlSi₃O₈

What is the formula for plagioclase feldspar?

(Na,Ca)(Si,Al)4O8

What is the formula of olivine?

(Mg,Fe)₂SiO₄

What is the formula of calcite?

CaCO₃

What are cations and anions?

A cation is a positively charged ion, while an anion is a negatively charged ion.

What do Silicates contain?

Contain silicon and oxygen

What do Carbonates contain?

Feature a carbon atom bonded to three oxygen atoms

What do Oxides contain

Consist of a metal element combined with oxygen, but contain no silicon

What do Sulfides Contain

when a metal combines with sulfur, but without any oxygen present

What do Sulfates contain

Contain a sulfur atom surrounded by four oxygen atoms

what do Halides contain

when halogen (Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), Astatine (At)) combines with metallic element

What do Phosphates contain

Built around a central phosphorus-oxygen tetrahedral group instead of silicon

What is the diagnostic number and orientation of cleavage plane directions in Quartz

none - concordial fracture

What is the diagnostic number and orientation of cleavage plane directions in feldspar

2 planes, 90 degrees, cube-like

What is the diagnostic number and orientation of cleavage plane directions in Amphibole

2 plane, 60 and 120 degrees

What is the diagnostic number and orientation of cleavage plane directions in pyroxene

2 plane, 90 degrees

What is the diagnostic number and orientation of cleavage plane directions in

3 plane, rhomboidal