18 Questions
Which one of the following mineral properties is not mentioned in the text?
Hexagonal Crystal Structure
What is the relationship between a mineral's specific gravity and its weight compared to water?
A mineral with a specific gravity of 1.5 is one and a half times heavier than water.
Which type of silicate is described in the text as containing iron or magnesium joined to the silicate structure?
Ferromagnesian silicates
What is the basic structure of a silicate mineral according to the text?
A silicon atom surrounded by four oxygen atoms.
What is the difference between cleavage and fracture in minerals?
Cleavage refers to the planar breakage of minerals, while fracture refers to the non-planar breakage.
What property of minerals is described in the text as being measurable using complex lab tools or simple procedures involving beakers and water displacement?
Specific Gravity
Which crystal structure has three symmetrical axes in the same plane and all of equal length?
Hexagonal
In which crystal structure do the axes intersect at angles other than 90°?
Monoclinic
Which crystal structure has two axes lying in the same plane at right angles to each other with the third axis inclined?
Monoclinic
Which mineral property refers to the resistance of a mineral to scratching?
Hardness
Which crystal structure is characterized by a rectangular prism with a rectangular base?
Orthorhombic
How many axes do triclinic crystals have?
Three
Which of the following statements about hexagonal crystal structure is correct?
It has three equal axes, all at 60° angles to each other.
Which of the following mineral properties is a measure of a mineral's resistance to scratching or abrasion?
Hardness
Which of the following crystal systems has three unequal axes, with all angles between the axes being oblique (not 90°)?
Triclinic
Which of the following crystal systems has two equal axes and one longer or shorter axis, with one angle between the axes being oblique (not 90°)?
Monoclinic
Which of the following crystal systems has three unequal axes, all at 90° angles to each other?
Orthorhombic
Which of the following statements about the isometric crystal system is correct?
It has three equal axes, all at 90° angles to each other.
Explore the differences in axes length relationships and angles between Pyrite Tetragonal Crystal Structure and Zircon Orthorhombic Crystal Structure. Understand how the axes are oriented in each crystal system.
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