Artroeite
A valid IMA mineral species
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About Artroeite
Formula:
Pb[AlF3(OH)2]
Colour:
Colourless
Lustre:
Vitreous
Hardness:
2½
Specific Gravity:
5.36
Crystal System:
Triclinic
Name:
For Dr. Arthur Roe (22 August 1912, Victor, Colorado, USA - 27 April 1993, Tucson, Arizona, USA), chemist and collector of microscopic minerals, of Tucson, Arizona, USA. He was inducted into the Micromounters' Hall of Fame in 1983.
Unique Identifiers
Mindat ID:
378
Long-form identifier:
mindat:1:1:378:4
Similar Names
| Arterite | A rock classification type |
IMA Classification of Artroeite
Approved
IMA Formula:
Pb2+AlF3(OH)2
Approval year:
1993
First published:
1995
Classification of Artroeite
3.CC.15
3 : HALIDES
C : Complex halides
C : Soro-aluminofluorides
3 : HALIDES
C : Complex halides
C : Soro-aluminofluorides
11.6.18.1
11 : HALIDE COMPLEXES
6 : Aluminofluorides - Isolated Octahedra
11 : HALIDE COMPLEXES
6 : Aluminofluorides - Isolated Octahedra
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 |
|---|---|---|
| Ate | 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 Artroeite
Vitreous
Transparency:
Translucent
Colour:
Colourless
Streak:
White
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
on {100}, good on {010}
on {100}, good on {010}
Fracture:
Conchoidal
Density:
5.36 g/cm3 (Measured) 5.43 g/cm3 (Calculated)
Optical Data of Artroeite
Type:
Biaxial (-)
RI values:
nα = 1.629 nβ = 1.682 nγ = 1.691
2V:
Measured: 41° to 42°, Calculated: 42°
Max. Birefringence:
δ = 0.062
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.
Dispersion:
r > v, strong
Chemistry of Artroeite
Mindat Formula:
Pb[AlF3(OH)2]
Element Weights:
Crystallography of Artroeite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 6.27 Å, b = 6.821 Å, c = 5.057 Å
α = 90.68°, β = 107.69°, γ = 104.46°
α = 90.68°, β = 107.69°, γ = 104.46°
Ratio:
a:b:c = 0.919 : 1 : 0.741
Unit Cell V:
198.62 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals bladed, flat tabular on {10_1}, elongated along [010], with forms {100}, {010}, {001}, {10_1}, {011}, {11_1} and {121}
Twinning:
Common, by rotation about [010] with composition plane {100}
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
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View
CIF File Best | x | y | z | a | b | c
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Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
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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) |
|---|---|---|---|---|---|---|---|
| 0001717 | Artroeite | Kampf A R, Foord E E (1995) Artroeite, PbAlF3(OH)2, a new mineral from the Grand Reef mine, Graham County, Arizona: Description and crystal structure American Mineralogist 80 179-183 |  | 1995 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.42 Å | (100) |
| 2.595 Å | (70) |
| 2.190 Å | (65) |
| 2.030 Å | (50) |
| 3.221 Å | (40) |
| 2.015 Å | (40) |
| 4.05 Å | (35) |
Reference:
Comments:
Recorded on material from Grand Reef Mine, Arizona, USA
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 45b : [Other oxidized fumarolic minerals] | |
| 47a : [Near-surface hydration of prior minerals] | |
| 47g : [Halogen-bearing surface weathering minerals] |
Type Occurrence of Artroeite
General Appearance of Type Material:
Bladed, tabular crystals to 1 mm
Place of Conservation of Type Material:
Natural History Museum, Los Angeles, California, USA (No. 39338)
Geological Setting of Type Material:
Oxidized zone of an epithermal Cu-Pb-Ag deposit
Associated Minerals at Type Locality:
Synonyms of Artroeite
Other Language Names for Artroeite
Common Associates
Associations Based on Photo Data:
| 9 photos of Artroeite associated with Tenorite | CuO |
| 2 photos of Artroeite associated with Caledonite | Pb5Cu2(SO4)3(CO3)(OH)6 |
| 2 photos of Artroeite associated with Matlockite | PbFCl |
| 1 photo of Artroeite associated with Calcioaravaipaite | PbCa2AlF9 |
| 1 photo of Artroeite associated with Napoliite | Pb2OFCl |
Related Minerals - Strunz-mindat Grouping
| 3.CC.05 | Gearksutite | Ca[Al(F,OH)5(H2O)] |
| 3.CC.10 | Acuminite | Sr[AlF4(OH)(H2O)] |
| 3.CC.10 | Tikhonenkovite | Sr[AlF4(OH)(H2O)] |
| 3.CC.20 | Jarlite | Na(Sr,Na)7MgAl6F32(OH,H2O)2 |
| 3.CC.20 | Calcjarlite | Na(Ca,Sr)3Al3(OH)2F14 |
| 3.CC.20 | Jørgensenite | Na2(Sr,Ba)14Na2Al12F64(OH,F)4 |
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 Artroeite
mindat.org URL:
https://www.mindat.org/min-378.html
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Please feel free to link to this page.
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References for Artroeite
Localities for Artroeite
Showing 6 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.
Italy | |
| Enrico Bonacina |
| Campostrini et al. (2005) +1 other reference | |
| Campostrini et al. (2005) +2 other references |
| Kasatkin et al. (2023) |
| Campostrini et al. (2005) +3 other references | |
USA (TL) | |
| Anthony et al. (1995) +2 other references |
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Vesuvius fumaroles, Metropolitan City of Naples, Campania, Italy