General Information:
Chemical Formula:
(Cu,Fe)6Hg2S5
Composition:
(Molecular Weight = 939.71 gm)
Iron 2.38 % Fe
Copper 37.87 % Cu
Mercury 42.69 % Hg
Sulfur 17.06 % S
Empirical Formula:
Cu5.6Fe2+0.4Hg2S5
IMA Status:
Approved IMA 1983
Locality:
Gortdrum deposit, Tipperary, Eire.
Name Origin:
Named for the locality.
Physical Properties:
Color:
lead gray or black.
Density:
6.8
Diaphaniety:
Opaque
Habits:
Anhedral Grains - Granular minerals without the expression of crystal shapes, Microscopic Crystals - Crystals visible only with microscopes.,
Hardness:
3.5-4 - Copper Penny-Flourite
Luster:
Metallic
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