chap03 - Chapter 3 Minerals Geology 11 Principles of...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 3 Minerals Geology 11 – Principles of Geology A. M. P. Tengonciang National Institute of Geological Sciences University of the Philippines, Diliman
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
3.1 What is a mineral? ± Definition ± Naturally occurring ± Inorganically formed ± Homogeneous solid ± Definite but not fixed chemical composition ± Ordered internal structure ± What is a crystal? ± Homogeneous ordered solid ± Has naturally formed plane faces ± Has a limited chemical composition ± Have definite geometric forms that reflect the arrangement of atoms of which they are composed ± Mineraloids ± Non-crystalline substances ± Sometimes amorphous ± No definite chemical formula ± May also be organic in nature ± Polymorphs ± Specific chemical compounds may exist in nature in more than one structural or atomic arrangement
Background image of page 2
3.2 Properties of minerals a. Color – caused by the absorption, or lack of absorption, of visible light by atomic bonds or electrons i. Idiochromatic – color due to composition ii. Allochromatic – color is due to trace impurities in their composition or defects in their structure iii. Pseudochromatic – “false” color due to light diffraction b. Streak – color of powdered mineral c. Luster – how the surface of a mineral reflects light i. ii. Submetallic – opaque to nearly opaque, reflects well iii. Vitreous (glassy) – reflects light like glass iv. Adamantine (brilliant,diamondlike) – transparent to translucent minerals that display extraordinary brilliance and shine v. Resinous (resinlike) – similar to clear candy or honey
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/20/2010 for the course LIR 30 taught by Professor Thornley,k during the Spring '08 term at Santa Rosa.

Page1 / 9

chap03 - Chapter 3 Minerals Geology 11 Principles of...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online