1) Lead mineral 2) Trigonal mineral
Found on
https://www.crosswordclues.com/clue/susannite
Susannite is a lead sulfate carbonate hydroxide mineral. It has the formula Pb4SO4(CO3)2(OH)2. Susannite is the higher temperature phase of the two and forms above 80 °C when fluids oxidize the lead ore deposits. It is trimorphous with leadhillite and macphersonite. Susannite crystallizes in the trigonal system. It is quite soft with a Mohs hardn...
Found on
http://en.wikipedia.org/wiki/Susannite
No exact match found.
