Substitution

Question 1

When ions of equal charge and nearly equal size substitute for one another

Answer 1

Simple Substitution

Question 2

sizes of the ions are nearly the same

Answer 2

Complete

Question 3

sizes are similar, but still very different

Answer 3

Partial/Limited

Question 4

an ion of different charge is substituted

Answer 4

Coupled

Question 5

or filling a site that is normally vacant in order to achieve charge balance (e.g. tremolite  sodic amphibole)

Answer 5

Coupled

Question 6

when an ion does occupy one of the voids in a crystal structure

Answer 6

Interstitial Solid Solution

Question 7

when an ion of higher charge substitutes for an ion of lower charge

Answer 7

Omission Solid Solution

Question 8

some minerals show complete
solid solution under one set of temperature/pressure conditions, and only limited solid solution under different temperature/pressure conditions

Answer 8

exsolution