- 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...
- Orthoclase, or
orthoclase feldspar (
endmember formula KAlSi3O8), is an
important tectosilicate mineral which forms igneous rock. The name is from the...
-
sodium endmember of the
plagioclase solid solution series. It
represents a
plagioclase with less than 10%
anorthite content. The pure
albite endmember has...
- most
common species of
tourmaline is schorl, the
sodium iron (divalent)
endmember of the group. It may
account for 95% or more of all
tourmaline in nature...
-
varies between the two
endmembers of the
solid solution series:
forsterite (Mg-
endmember: Mg 2SiO 4) and
fayalite (Fe-
endmember: Fe 2SiO 4). Compositions...
- Beta-decay of 36Cl. 40Ar is a
product of
radiogenic decay of 40K.
Different endmembers values for 40Ar/36Ar have been reported; Air = 295.5, MORB = 40,000, and...
-
primarily a solid-solution
series between the iron-
endmember annite, and the magnesium-
endmember phlogopite; more
aluminous end-members
include siderophyllite...
- Na4Al3Si9O24Cl if a pure
endmember or Na4(AlSi3O8)3(Cl2,CO3,SO4) with
increasing meionite content.
Marialite is the
sodium endmember of the
scapolite group...
- 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...
