Formula :
Pb2O(CO3)
System: orthorhombic Hardness:3 - 3½ Rarity:rare
Strunz id:V-BE.05 -
NITRATES, CARBONATES and BORATES
Name origin: Named in honor of David Shannon (18 December 1942, Moline, Illinois, USA - 2 January 2004, Mesa, Arizona, USA), prolific Arizona mineral collector and dealer. He helped collect the first specimens of the mineral.
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