Definitions
anorthite Tweet Definition of anorthite Like Definition of anorthite on Facebook
noun (plural: anorthites)
  1. (mineralogy) A plagioclase feldspar, the final member of the Albite-Anorthite solid solution series. Anorthite is very rare on Earth, but abundant in moon rocks. This is because Anorthite weathers rapidly to clay minerals under atmospheric conditions. Good crystals have been found in lava-digested limestone blocks erupted from Mount Vesuvius.
  • Chemical composition: Calcium aluminum silicate, <math>CaAlSi?_3O_8</math>
  • Physical properties:
    Moh's Hardness: 6.0
    Specific gravity: 2.76
    Color: Shades of gray, often with a blue, purple, or green cast
    Luster: glassy
    Fracture: conchoidal
    Cleavage: two good at about 94º to each other
  • Habit: Triclinic - pinacoidal. Crystals are well developed, forming massive clumps, and are both twinned and striated.
Etymology: Greek "less than straight, not perpendicular" - a reference to the odd angles at which crystals grow.


Supplemental Details:Sponsor an extended definition for anorthite for as little as $10 per month. Click here to contact us.

     
  

 Find:
  Words Starting With:
  Words Ending With:
  Words Containing:
  Words That Match:

 
 Translate Into:
  
Dutch   French   German
  
Italian   Spanish
    Show results per page.

Browse the Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

   
Dictionary content provided from Wiktionary.org under the GNU Free Documentation License
Allwords Copyright 1998-2019 All rights reserved.