- An
endmember (also end-member or end member) in
mineralogy is a
mineral that is at the
extreme end of a
mineral series in
terms of
purity of its chemical...
-
Anorthite (an = not,
ortho = straight) is the
calcium endmember of the
plagioclase feldspar mineral series. The
chemical formula of pure
anorthite is...
-
sodium endmember of the
plagioclase solid solution series. It
represents a
plagioclase with less than 10%
anorthite content. The pure
albite endmember has...
- Orthoclase, or
orthoclase feldspar (
endmember formula KAlSi3O8), is an
important tectosilicate mineral which forms igneous rock. The name is from the...
- Fe1−xS (where x = 0 to 0.2) (monoclinic or hexagonal) Troilite, FeS, the
endmember of
pyrrhotite (hexagonal) Mackinawite, Fe1+xS (where x = 0 to 0.1) (tetragonal)...
-
primarily a solid-solution
series between the iron-
endmember annite, and the magnesium-
endmember phlogopite; more
aluminous end-members
include siderophyllite...
- and
violet to dark red.
Purpurite forms a
series with the iron-bearing
endmember heterosite, FePO4.
Manganese violet Warr, L.N. (2021). "IMA–CNMNC approved...
-
expressed in
terms of
three endmembers: pot****ium
feldspar (K-spar)
endmember KAlSi3O8
albite endmember NaAlSi3O8
anorthite endmember CaAl2Si2O8
Solid solutions...
- most
magnesic and
trioctahedral endmember, to palygorskite, the
least magnesic, most Al- Fe- bearing,
dioctahedral endmember.
Originally named meerschaum...
-
minerals in the
feldspar group, and
containing pot****ium:
Orthoclase (
endmember formula KAlSi3O8), an
important tectosilicate mineral that
forms igneous...
