Difference between revisions of "Covellite"
Jump to navigation
Jump to search
(username removed) |
(username removed) |
||
| Line 2: | Line 2: | ||
== Description == | == Description == | ||
| − | Dark blue hexagonal crystals or black powder composed of [http://cameo.mfa.org/materials/fullrecord.asp?name=copper | + | Dark blue hexagonal crystals or black powder composed of [http://cameo.mfa.org/materials/fullrecord.asp?name=copper%20sulfide copper sulfide]. Covellite was named for Niccolo Covelli after he discovered the mineral at Vesuvius in the early 19th century. Copper sulfide was probably used as a black pigment in antiquity (Orna et al 1980). It is currently used in antifouling paints and in textile dying with [http://cameo.mfa.org/materials/fullrecord.asp?name=aniline%20black aniline black]. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| Line 32: | Line 32: | ||
== Additional Information == | == Additional Information == | ||
| − | M.V.Orna, M.J.D.Low, N.S.Baer, "Synthetic Blue Pigments: Ninth to Sixteenth Centuries. I. Literature" ''Studies in Conservation'', 25:53-63, 1980. Mineralogy Database: [http://www.webmineral.com/data/Covellite.shtml Covellite] | + | ° M.V.Orna, M.J.D.Low, N.S.Baer, "Synthetic Blue Pigments: Ninth to Sixteenth Centuries. I. Literature" ''Studies in Conservation'', 25:53-63, 1980.° Mineralogy Database: [http://www.webmineral.com/data/Covellite.shtml Covellite] |
== Authority == | == Authority == | ||
| − | * | + | * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979 |
* Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Covellite (Accessed Sept. 7, 2005) | * Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Covellite (Accessed Sept. 7, 2005) | ||
Revision as of 06:28, 24 July 2013
Description
Dark blue hexagonal crystals or black powder composed of copper sulfide. Covellite was named for Niccolo Covelli after he discovered the mineral at Vesuvius in the early 19th century. Copper sulfide was probably used as a black pigment in antiquity (Orna et al 1980). It is currently used in antifouling paints and in textile dying with aniline black.
Synonyms and Related Terms
copper sulfide; covelliet (Ned.)
Other Properties
Hexagonal crystals. Cleavage is perfect in one direction. Fracture = uneven. Luster = submetallic. Streak = gray to black
| Composition | CuS |
|---|---|
| Mohs Hardness | 1.5 - 2.0 |
| Density | 4.6-4.8 |
Hazards and Safety
Unstable in air.
Additional Information
° M.V.Orna, M.J.D.Low, N.S.Baer, "Synthetic Blue Pigments: Ninth to Sixteenth Centuries. I. Literature" Studies in Conservation, 25:53-63, 1980.° Mineralogy Database: Covellite
Authority
- C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
- Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Covellite (Accessed Sept. 7, 2005)