| Home Page | Log In | Message Board | The Mindat Directory |
| Register | Search Pages | Mineral Chatroom | The Mindat Store |
|
|
|
Sterling mine, Antwerp, Jefferson Co., New York, USA
© Rob Lavinsky
| Formula: |
| |||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| System: | Monoclinic | Colour: | Golden yellow to yellow ... | |||||||||||||||||||||
| Hardness: | 1 | |||||||||||||||||||||||
| Name: | Named by Charles Upham Shepard in 1851 from the Greek, Χαλχωδηξ, meaning "like brass" in allusion to its appearance. | |||||||||||||||||||||||
Classification of Chalcodite | ||||||||||||||||||||||
| mindat.org URL: | http://www.mindat.org/min-39169.html Please feel free to link to this page. | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Physical Properties of Chalcodite | ||||||||||||||||||||||
| Lustre: | Sub-Vitreous, Resinous, Pearly, Sub-Metallic | |||||||||||||||||||||
| Diaphaneity (Transparency): | Transparent, Translucent | |||||||||||||||||||||
| Comment: | Sometimes said to be "bronzy". | |||||||||||||||||||||
| Colour: | Golden yellow to yellow brown | |||||||||||||||||||||
| Streak: | Yellow to greenish brown; also dark brown | |||||||||||||||||||||
| Hardness (Mohs): | 1 | |||||||||||||||||||||
| Hardness Data: | Measured | |||||||||||||||||||||
| Tenacity: | Flexible | |||||||||||||||||||||
| Cleavage: | Perfect {001} | |||||||||||||||||||||
| Fracture: | Micaceous | |||||||||||||||||||||
| Density (measured): | 2.76 g/cm3 | |||||||||||||||||||||
Crystallography of Chalcodite | ||||||||||||||||||||||
| Crystal System: | Monoclinic | |||||||||||||||||||||
Optical Data of Chalcodite | ||||||||||||||||||||||
| Type: | Biaxial (-) | |||||||||||||||||||||
| RI values: | nα = 1.580 - 1.635 nβ = 1.660 - 1.740 nγ = 1.730 - 1.740 | |||||||||||||||||||||
| Birefringence: | 0.005 | |||||||||||||||||||||
| Maximum Birefringence: | δ = 0.150 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. | |||||||||||||||||||||
| Surface Relief: | High | |||||||||||||||||||||
| Pleochroism: | Visible | |||||||||||||||||||||
| Comments: | X = pale greenish yellow to colorless, Y = Z = deep grass green | |||||||||||||||||||||
| Comments: | ~68 mole % ferric-dominant material, Cowcliff Hill, Western Otago, New Zealand (Hutton, 1945) | |||||||||||||||||||||
Chemical Properties of Chalcodite | ||||||||||||||||||||||
| Formula: |
| |||||||||||||||||||||
| Essential elements: | Fe, K, O, Si | |||||||||||||||||||||
| All elements listed in formula: | Al, Fe, H, K, Mg, O, Si | |||||||||||||||||||||
| Analytical Data: | SiO2 44.52 Al2O3 7.19 Fe2O3 27.32 FeO 3.31 TiO2 0.10 MnO 0.42 MgO 5.63 CaO 0.23 Na2O 0.32 K2O 1.77 H2O+ 6.70 H2O- 2.70 Hutton (1945) | |||||||||||||||||||||
Other Information | ||||||||||||||||||||||
| Fluorescence in UV light: | Not fluorescent | |||||||||||||||||||||
| Health Warning: | Shepard, Charles U., 1852, Chalcodite, A Treatise on Mineralogy, third edition, B. L. Hamlin, New Haven, p. 153. Dana, Edward S., 1892, The System of Mineralogy, sixth edition,, John Wiley & Sons, New York, p. 658. Hutton, C. Osborne, 1945, Additional Optical and Chemical Data on the Stilpnomelane Group of Minerals,American Mineralogist v. 30, p. 714-718. Winchell, Alexander N. and Winchell, Horace, 1951, Optical Mineralogy, fourth edition, part 2, p. 390. Hutton, C. Osborne, 1945, Further Data on the Stilpnomelane Mineral Group,American Mineralogist v.41 p. 608. Deer, W. A., Howie, R. A., and Zussman, J., 1971, Stilpnomelane,Rock-Forming Minerals, volume 3 Sheet Silicates p. 103-114. | |||||||||||||||||||||
References for Chalcodite | ||||||||||||||||||||||
| Reference List: - + | US Bureau Mines glossary | |||||||||||||||||||||
Internet Links for Chalcodite | ||||||||||||||||||||||
| Search Engines: |
| |||||||||||||||||||||
| Mineral Dealers: | ||||||||||||||||||||||
| Jobs: | ||||||||||||||||||||||
Localities for Chalcodite | ||||||||||||||||||||||
|
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the
 symbol to view information about a locality.
The symbol next to localities in the list
can be used to jump to that position on the map.
| ||||||||||||||||||||||
|
Mineral and Locality SearchOptions| Fade toolbar when not in focus | Fix toolbar to bottom of page | ||
|---|---|---|---|
| Hide Social Media Links | |||
| Slideshow frame delay | seconds | ||
