Asisite

Asisite (Pb7SiO8Cl2) is a yellow tetragonal mineral. It is found at Kombat Mine, Kombat, Grootfontein District, Otjozondjupa Region, Namibia. It was named for a farm, Asis, which covers the mine where it was found. It was discovered in 1988.
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General Information:
 Chemical Formula:
Pb7SiO8Cl2
 Composition:
(Molecular Weight = 1,677.39 gm)
Silicon 1.67 % Si
Lead 86.47 % Pb
Chlorine 4.23 % Cl
Oxygen 7.63 % O 
 Empirical Formula:
Pb7SiO8Cl2
 IMA Status:
Approved IMA 1986
Physical Properties:
 Cleavage:
[???] Perfect
 Color:
green yellow or yellow.
 Diaphaniety:
Transparent
 Hardness:
3.5-4 - Copper Penny-Flourite
 Luster:
Adamantine
 Streak:
yellow white
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