First, the composition and structure
K(LiFeAl)[AlSi 3 O 10 ](OHF) 2 usually contains elements such as Na, Rb, Sr, Ba, Ca, and Mn. Jiangxi South wolframite quartz veins output zinnwaldite containing Li 2 O 3.26%, SiO 2 39.50%, Al 2 O 3 24.25%, K 2 O 9.49%, FeO 10.99%, Fe 2 O 3 4.89% MnO 1.99%, Na 2 O 0.85%, F 5.27%, H 2 O 1.78%. The mineral is a monoclinic system.
Â Second, the materialized nature
The crystals are in the shape of a pseudo-hexagonal plate, often produced as a scaly aggregate. The cleavage (001) is extremely complete, the sheet is elastic, the hardness is 2 to 3, the relative density is 2.9 to 3.2, taupe, yellowish brown, and sometimes light green or dark green. Glass luster, cleavage surface is pearly, translucent to opaque.
Â Â Â Third, the identification features
Iron lithium mica differs from muscovite, biotite and lithium mica in its color. The exact identification requires chemical analysis.
Â Â Â Fourth, the birthplace and origin
Iron lithium mica is produced in granitic pegmatites, granites and quartz veins containing black tungsten ore, cassiterite and topaz , and is symbiotic with the above minerals. The production areas include Hunan Linwu, Jiangxi Wanyuan and Jiangxi Hailuoling.
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