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Strunz Classification System

I  -  Elements

Mineral Formula Classification
A  -  Metallic and intermetallic compounds
Series 5  -  Lead series
Lead Pb  I / A.5-20
B  -  Semi-metals and non-metals
Series 1   -  Arsenic - bismuth series
Antimony Sb I / B.1-30
Bismuth Bi I / B.1-40
Series 2   -  Carbon series (graphite - lonsdaleite)
Graphite C I / B.2-10
Series 3   -  Sulfur - selenium series
Sulfur S I / B.3-10


Strunz Classification System
I - II - III - IV - V - VI - VII - VIII/A - VIII/B - VIII/C -
VIII/D - VIII/E - VIII/F - VIII/G - VIII/H - VIII/J - SW