Hyalotekite

minerals

yttrium

reedmergnerite

melanotekite

Images
Formula: (Ba,Pb,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28F
Unclassified silicate, hyalotekite group
Specific gravity: 3.81 to 3.82
Hardness: 5½
Streak: White
Colour: White to pearly grey
Common impurities: Fe,Mn,Cu,Mg,Sr,Na,Rb
Environments:

Pegmatites
Metamorphic environments

Localities

At the type locality, the Långban mine, Långban Ore District, Filipstad, Värmland County, Sweden, hyalotekite occurs in high temperature manganese skarn. Associated minerals include quartz, calcite, hematite, barylite, baryte, manganese-bearing pectolite, iron-bearing K-feldspar, andradite, melanotekite, barium-bearing hedyphane, lead-bearing taramellite, rhodonite and manganese-bearing aegirine (HOM, Mindat).

At the Dara-i-Pioz Glacier, Districts of Republican Subordination, Tajikistan, hyalotekite occurs in reedmergnerite pegmatite in an alkaline massif, associated with feldspar, reedmergnerite, aegirine, pyrochlore, eudialyte and polylithionite (HOM).

Back to Minerals