| 释义 |
tro·na
\ˈtrōnə\ noun
(-s)
Etymology: Swedish, probably from Arabic naṭrūn natron — more at natron
: a gray-white or yellowish white monoclinic mineral Na3H(CO3)2.2H2O consisting of a hydrous acid sodium carbonate in crystals or fibrous or columnar masses as a deposit from various soda-brine springs and lakes (hardness 2.5-3, specific gravity 2.11-2.14) |