Kaersutite
A species of Minerals, Also known as Sodic amphibole Scientific name : Kaersutite RockType : Minerals
Kaersutite, A species of Minerals
Also known as:
Sodic amphibole
Scientific name: Kaersutite
RockType: Minerals
Content
Description
Photo By James St. John , used under 合作作者 /Cropped and compressed from original 
Description
Kaersutite is a dark brown to black double chain calcic titanium bearing amphibole mineral with formula: NaCa2(Mg3TiAl)(Si6Al2)O22(OH)2. Ferro-kaersutite is the divalent iron rich endmember of the kaersutite group, with the iron replacing magnesium in the structure. It occurs as phenocrysts in alkalic volcanic rocks; in nodules of peridotite and gabbro in alkalic basalts; in syenites, monzonites and carbonatite tuffs. Mineral association includes titanian augite, rhoenite, olivine, ilmenite, spinel, plagioclase and titanian pargasite. It was first described in 1884 and is named for Qaersut (formerly Kaersut), Umanq district in northern Greenland. 
Physical Properties
Colors
Dark brown to black
Chemical Properties
Formula
{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
The Kaersutite group minerals are WO2- dominant amphiboles defined with :
A(Na+K+2Ca)> 0.5 apfu,
B: Ca dominant
CTi > 0.5 apfu and
WO > 1.0 apfu
Kaersutite is defined with
A position: Na dominant
C2+ position: Mg dominant
C3+ position: Al dominant
Elements listed
Al, Ca, Mg, Na, O, Si, Ti
Common Impurities
Fe,Mn,K,F,H2O
AI rock expert in your pocket
Scan QR code to download
