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...

varies between the two endmembers of the solid solution series: forsterite (Mg-endmember: Mg 2SiO 4) and fayalite (Fe-endmember: Fe 2SiO 4). Compositions...

Orthoclase, or orthoclase feldspar (endmember formula KAlSi3O8), is an important tectosilicate mineral which forms igneous rock. The name is from the...

(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8    (Fe endmember) Clinochlore – Mg5Al(AlSi3O10)(OH)8    (Mg endmember) Cookeite – (LiAl4◻)[AlSi3O10](OH)8 Kaolinite-Serpentine...

sodium endmember of the plagioclase solid solution series. It represents a plagioclase with less than 10% anorthite content. The pure albite endmember has...

be expressed in terms of three endmembers: orthoclase endmember KAlSi3O8 albite endmember NaAlSi3O8 anorthite endmember CaAl2Si2O8 Solid solutions between...

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...

series from the pure magnesium endmember to the pure iron endmember[citation needed]. The latter, the iron-rich endmember of the γ-olivine solid solution...

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...

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...

series with the magnesium olivine endmember forsterite (Mg2SiO4) and also with the manganese rich olivine endmember tephroite (Mn2SiO4). Iron rich olivine...

Ferberite is the iron endmember of the manganese–iron wolframite solid solution series. The manganese endmember is hübnerite. Ferberite is a black monoclinic...

Majorite is a mineral found in the mantle of the Earth. Its chemical formula is Mg3(MgSi)(SiO4)3. It is a type of garnet, distinguished from other garnets...

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...

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)...

varies between the two endmembers of the solid solution series: forsterite (Mg-endmember: Mg2SiO4) and fayalite (Fe-endmember: Fe2SiO4) but the ratio...

magnesium-chromium garnet species with the formula Mg3Cr2(SiO4)3. Pure endmember knorringite never occurs in nature. Pyrope rich in the knorringite component...

magnesic and trioctahedral endmember, to palygorskite, the least magnesic, most Al- and Fe-bearing, most dioctahedral endmember. Originally named meerschaum...

phyllosilicates. It is also known as magnesium mica. Phlogopite is the magnesium endmember of the biotite solid solution series, with the chemical formula KMg3AlSi3O10(F...

Hessel (1796–1872) in 1826. The series ranges from albite to anorthite endmembers (with respective compositions NaAlSi3O8 to CaAl2Si2O8), where sodium and...

amphibole group of minerals with formula Fe7Si8O22(OH)2. It is the iron endmember of the grunerite-cummingtonite series. It forms as fibrous, columnar or...

Enstatite is a mineral; the magnesium endmember of the pyroxene silicate mineral series enstatite (MgSiO3) – ferrosilite (FeSiO3). The magnesium rich...

contain large amounts of potassium in the crystal lattice. Orthoclase (endmember formula KAlSi3O8), an important tectosilicate mineral that forms igneous...

7Si 8O 22(OH) 2 for magnesiocummingtonite to the iron rich grunerite endmember Fe 7Si 8O 22(OH) 2. Cummingtonite is used to describe minerals of this...

4S 13. It is the antimony endmember of the continuous solid solution series with arsenic-bearing tennantite. Pure endmembers of the series are rarely if...

with the chemical formula (Mg,Fe2+)Al2(PO4)2(OH)2. Lazulite forms one endmember of a solid solution series with the darker, iron-rich scorzalite. Lazulite...

commonly found in granulite facies’ metamorphic regions, sensu stricto as an endmember of the charnockite series. The charnockite suite or series is a particularly...

calcium, and sodium silicate with chlorine, carbonate and sulfate. The two endmembers are meionite (Ca4Al6Si6O24CO3) and marialite (Na4Al3Si9O24Cl). Silvialite...