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Domerockite
A valid IMA mineral species
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About Domerockite
Mineralogical Society of Victoria fieldtrip 2003, typical open cut
Dome Rock Copper Mine, Boolcoomatta Reserve, Pastoral Unincorporated Area, South Australia, Australia
Dome Rock Copper Mine, Boolcoomatta Reserve, Pastoral Unincorporated Area, South Australia, Australia
Formula:
Cu4(AsO4)(AsO3OH)(OH)3 · H2O
Colour:
Bluish green
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
4.44 (Calculated)
Crystal System:
Triclinic
Name:
Named after the type locality.
A very rare secondary copper arsenate.
Unique Identifiers
Mindat ID:
39551
Long-form identifier:
mindat:1:1:39551:5
IMA Classification of Domerockite
Approved
IMA Formula:
Cu2+4(As5+O4)(As5+O3OH)(OH)3·H2O
Approval year:
2009
First published:
2013
Classification of Domerockite
8.C0.
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
0 :
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
0 :
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 for Standard |
|---|---|---|
| Dom | 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 Domerockite
Vitreous
Transparency:
Translucent
Colour:
Bluish green
Streak:
Pale green
Hardness:
3 on Mohs scale
Comment:
~3
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
4.44 g/cm3 (Calculated)
Comment:
Calculation based on the structure refinement
Optical Data of Domerockite
Type:
Biaxial (-)
RI values:
nα = 1.798(4) nβ = 1.814(4) nγ = 1.817
2V:
Calculated: 46°
Max. Birefringence:
δ = 0.019
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Pleochroism:
Weak
Comments:
Very weak. X = pale greenish yellow, Y = greenish blue, Z
= greenish blue.
= greenish blue.
Comments:
Absorption: X < Y = Z.
Chemistry of Domerockite
Mindat Formula:
Cu4(AsO4)(AsO3OH)(OH)3 · H2O
Element Weights:
Elements listed:
Crystallography of Domerockite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.378(11) Å, b = 8.962(2) Å, c = 9.841(2) Å
α = 75.25(3)°, β = 83.56(3)°, γ = 79.97(3)°
α = 75.25(3)°, β = 83.56(3)°, γ = 79.97(3)°
Ratio:
a:b:c = 0.6 : 1 : 1.098
Unit Cell V:
450.5 ų
Z:
2
Morphology:
Equant to short prismatic and tabular crystals. Crystal forms are major {100}, {010} and {001}, and minor {011}, {012}, and {212}.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0020093 | Domerockite | Elliott P, Kolitsch U, Willis A C, Libowitzky E (2013) Description and crystal structure of domerockite, Cu4(AsO4)(AsO3OH)(OH)3*H2O a new mineral from the Dome Rock mine, South Australia Mineralogical Magazine 77 509-522 | 2013 | Dome Rock mine, South Australia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.716 Å | (30) |
| 3.697 Å | (25) |
| 3.605 Å | (30) |
| 3.119 Å | (60) |
| 3.073 Å | (100) |
| 2.856 Å | (40) |
| 2.464 Å | (50) |
| 2.443 Å | (40) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Domerockite
General Appearance of Type Material:
Aggregates of equant to short prismatic and tabular crystals up to 0.3 mm long and 0.2 mm across.
Place of Conservation of Type Material:
Department of Mineralogy, South Australian Museum, Adelaide, South Australia, G32329.
Geological Setting of Type Material:
A supergene mineral, forming with others in thin seams in a schist matrix.
Associated Minerals at Type Locality:
Synonyms of Domerockite
Other Language Names for Domerockite
Dutch:Domerockiet
German:Domerockit
Common Associates
Associations Based on Photo Data:
| 5 photos of Domerockite associated with Conichalcite | CaCu(AsO4)(OH) |
| 1 photo of Domerockite associated with Kaolinite | Al2(Si2O5)(OH)4 |
Related Minerals - Strunz-mindat Grouping
| 8.C0. | Mikehowardite | Fe3+4(V5+O4)4(H2O)2 · H2O |
| 8.C0. | Batagayite | CaZn2(Zn,Cu)6(PO4)4[PO3OH]3 · 12H2O |
Fluorescence of Domerockite
No fluorescence under UV irradiation.
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 Domerockite
mindat.org URL:
https://www.mindat.org/min-39551.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Domerockite
Localities for Domerockite
Showing 1 localities.
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.
Australia (TL) | |
| Elliott et al. (2013) |
Quick NavTopAbout DomerockiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Dome Rock Copper Mine, Boolcoomatta Reserve, Pastoral Unincorporated Area, South Australia, Australia