Mineralogy Basics Quiz

A mineral is a natural, homogenous solid with a definite chemical composition and a highly structured atomic arrangement that mainly forms through inorganic processes.

An organic process incorporates carbon atoms, while an inorganic process occurs without using carbon atoms.

The 32 classes are the total number of combinations of symmetry operations.

<p>The criterion involves using the Hermann-Mauguin International Symbols to determine class names and their symmetry.</p> Signup and view all the answers

<p>Bravais Law states that development of a face in a crystal usually takes place if it intersects a larger number of lattice points.</p> Signup and view all the answers

<p>This law stipulates that all crystals made of similar substances have the same angles between corresponding faces.</p> Signup and view all the answers

<p>A unit cell is a group of atoms or molecules arranged in a space lattice that can be repeated in an infinite array.</p> Signup and view all the answers

<p>Vectorial properties refer to properties that depend on direction in the crystal.</p> Signup and view all the answers

<p>Crystallographic axes are determined through measurements of the angles between crystal faces.</p> Signup and view all the answers

<p>The spacing ensures a plane lattice of orderly points that define distances and angles through translational symmetry.</p> Signup and view all the answers

<p>An axial ratio refers to the relative lengths of the crystallographic axes.</p> Signup and view all the answers

<p>A unit face refers to the largest face that intersects all three crystallographic axes.</p> Signup and view all the answers

<p>A crystal form refers to a number of crystal faces related by symmetry.</p> Signup and view all the answers

<p>A form symbol refers to the graphic notation used to designate crystal forms.</p> Signup and view all the answers

<p>Miller Indices are a conventional notation used to indicate the parameters of a crystal face.</p> Signup and view all the answers

<p>Miller Indices involve relative values of intercepts, allowing faces to move without changing their parameters.</p> Signup and view all the answers

<p>They help determine the faces of crystals in various crystal systems.</p> Signup and view all the answers

<p>A pedion is a single-faced, open form occurring in the pedial class.</p> Signup and view all the answers

<p>A pinacoid refers to a single-faced, open form that occurs in various crystal classes.</p> Signup and view all the answers

<p>A prism refers to an open form comprising at least three parallel faces.</p> Signup and view all the answers

<p>A pyramid is an open form with three, four, six, eight, or twelve faces that meet at a point.</p> Signup and view all the answers

<p>Dipyramids are closed forms comprising six, eight, twelve, sixteen, or twenty-four faces.</p> Signup and view all the answers

<p>An octahedron is an 8-faced form resulting from three 4-fold axes with perpendicular mirror planes.</p> Signup and view all the answers

<p>A dodecahedron is a closed 12-faced form created by cutting off the edges of a cube.</p> Signup and view all the answers

<p>A closed form has faces that completely enclose space, while an open form has faces that do not.</p> Signup and view all the answers

<p>A zone is a group of crystal faces with edges parallel to a line, indicated using square brackets.</p> Signup and view all the answers

<p>Continuous properties remain the same along any direction, while discontinuous properties vary by direction.</p> Signup and view all the answers

<p>Bragg's Law relates to the wavelength of X-rays and the angle of diffracted rays, aiding in crystal structure identification.</p> Signup and view all the answers