Danbaite
A valid IMA mineral species
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Formula:
CuZn2
Colour:
Silvery white to grayish white
Lustre:
Metallic
Hardness:
4
Specific Gravity:
7.36 (Calculated)
Crystal System:
Isometric
Name:
For the type locality.
Unique Identifiers
Mindat ID:
1217
Long-form identifier:
mindat:1:1:1217:7
GUID
(UUID V4):
(UUID V4):
37409244-31f8-415c-a86f-f5b1972044c3
IMA Classification of Danbaite
Approved
First published:
1982
Classification of Danbaite
1.AB.10b
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
B : Zinc-brass family
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
B : Zinc-brass family
Dana 7th ed.:
1.1.6.1
1.1.6.1
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1.10
1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Dba | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Danbaite
Metallic
Transparency:
Opaque
Colour:
Silvery white to grayish white
Hardness:
4 on Mohs scale
Hardness:
VHN20=234 - 288 kg/mm2 - Vickers
Cleavage:
None Observed
Density:
7.36 g/cm3 (Calculated)
Optical Data of Danbaite
Type:
Isotropic
Reflectivity:
| Wavelength | R |
|---|---|
| 405nm | 71.3% |
| 436nm | 71.0% |
| 482nm | 71.0% |
| 526nm | 68.3% |
| 546nm | 68.5% |
| 589nm | 67.9% |
| 644nm | 66.8% |
| 656nm | 66.6% |
| 664nm | 66.6% |
| 700nm | 65.8% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 71.3%.
Colour in reflected light:
White with milky blue tint - slightly yellowish as compared to chromium.
Internal Reflections:
None
Chemistry of Danbaite
Mindat Formula:
CuZn2
Elements listed:
Crystallography of Danbaite
Crystal System:
Isometric
Cell Parameters:
a = 7.7615 Å
Unit Cell V:
467.56 ų (Calculated from Unit Cell)
Z:
32
Morphology:
Botryroidal aggregates, rims on chromium.
Twinning:
None observed
Comment:
Point Group: n.d.; Space Group: n.d.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.0803 Å | (100) |
| 2.3552 Å | (50) |
| 2.1574 Å | (40) |
| 1.3732 Å | (40) |
| 1.5901 Å | (30) |
| 1.2256 Å | (30) |
| 1.2154 Å | (30) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3a: Earth’s earliest Hadean crust | >4.50 |
| 7 : Ultramafic igneous rocks | |
| High-𝑇 alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Danbaite
General Appearance of Type Material:
Botryoidal and spherulitic aggregates, to 0.15 mm in diameter. As a thin film 10 µm thick around the native chromium.
Place of Conservation of Type Material:
National Museum for Geology, Beijing, China, number M08762 (type).
Geological Setting of Type Material:
Platinum bearing Cu-Ni deposit in ultramafic rocks.
Associated Minerals at Type Locality:
Reference:
Yue, S., Wang, W., Liu, J., Sun, S., Chen, D. (1982): A study on danbaite. Chinese Science Bulletin [Kexue Tongbao]: 27(22): 1383-1386.
Synonyms of Danbaite
Other Language Names for Danbaite
Related Minerals - Strunz-mindat Grouping
| 1.AB. | Magnesium | Mg |
| 1.AB.05 | Cadmium | Cd |
| 1.AB.05 | Rhenium | Re |
| 1.AB.05 | Zinc | Zn |
| 1.AB.05 | Titanium | Ti |
| 1.AB.10a | Zhanghengite | CuZn |
| 1.AB.10a | α-Brass | Cu3Zn |
| 1.AB.10b | Tongxinite | Cu2Zn |
| 1.AB.10a | Zinccopperite | Cu7Zn4 (?) |
| 1.AB.10 | UM2003-03-E:AgAuCuZn | (Cu,Au,Ag)4Zn |
| 1.AB.10 | UM1980-01-E:CuZn | Cu3Zn |
| 1.AB.10 | UM1980-02-E:CuZn | Cu4.45Zn |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Danbaite
mindat.org URL:
https://www.mindat.org/min-1217.html
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References for Danbaite
Reference List:
Localities for Danbaite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
China (TL) | |
| |
Russia | |
|
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