hyalotekite
noun
hy·a·lo·te·kite
ˌhīəlōˈtēˌkīt
plural -s
: a mineral approximately (Pb,Ca,Ba)4BSi6O17(OH,F) consisting of a borosilicate and fluoride of lead, barium, and calcium found in crystalline masses
Word History
Etymology
Swedish hyalotekit, from hyal- + Greek tēkein to melt + Swedish -it -ite; from the fact that it fuses to a clear glass