Chemistry Reference
In-Depth Information
Al
Al
Si
mullite
Ca
andalousite, kyanite
sillimanite
Fe, Mg
zoisite
clinozoisite
meionite
Tschermak
molecule
lawsonnite
anorthite
[Al-diopside]
gehlenite
[esseneite]
[pistachite]
prehnite
grossular
marialite
albite
Na-melilite
[pumpellyite]
[vesuvianite]
Ca
Si
calcite
quartz
[pumpellyite]
[vesuvianite]
merwinite
åkermanite
andradite
[pistachite]
diopside
hédenbergite
tremolite
[esseneite]
[hornblendes]
monticellite
actinolite
talc
anthophyllite
enstatite
dolomite
forsterite
humites
italics: mineral containing
volatile elementss H
2
O, CO
2
, F, Cl.
brucite
magnesite
limite of saturation in silica
périclase
bold
mostly iron-rich mineral
[ ] : projection in both triangles
Fe, Mg
Figure 3.35
Composition calcic, magnesian and calc-magnesian minerals in the diagramme
Ca-Si-Al-Fe-Mg diagram. Projection of two faces of this tetrahedron: some
minerals are actually in the Ca-Al-Si or Ca-Si-Fe, Mg planes; others at the
center of the tetrahedron project on these two planes.
