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Artroeite

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Formula:
Pb[AlF
 
3
(OH)
 
2
]
System:TriclinicColour:Colourless
Lustre:VitreousHardness:
Name:For Dr. Arthur Roe (1912-1993), American chemist and collector of microscopic minerals, of Tucson, Arizona, USA.


An aluminium complex salt mineral. Structurally related to gearksutite.

Classification of Artroeite

IMA status:Approved 1993
Strunz 8th edition ID:3/C.01-35
Nickel-Strunz 10th (pending) edition ID:3.CC.15

3 : HALIDES
C : Complex halides
C : Soro-aluminofluorides
Dana 8th edition ID:11.6.18.1

11 : HALIDE COMPLEXES
6 : Aluminofluorides - Isolated Octahedra
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Type Occurrence of Artroeite

Type Locality:Grand Reef Mine (Aravaipa Mine; Lead Jewel; Joe Rubal Mine; Vivian Mine; Calistoga Mining & Development Co. Mine; Bringham Silver and Lead Mine), Laurel Canyon, Grand Reef Mountain, Klondyke, Santa Teresa Mts, Aravaipa District, Graham Co., Arizona, USA
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)
Year of Discovery:1993
Geological Setting of type material:Oxidized zone of an epithermal Cu-Pb-Ag deposit
Associated Minerals at type locality:
QuartzMuscoviteLinariteGalenaFluorite
CalcioaravaipaiteAnglesite

Physical Properties of Artroeite

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:Colourless
Streak:White
Hardness (Mohs):
Tenacity:Brittle
Cleavage:Perfect
on {100}, good on {010}
Fracture:Conchoidal
Density (measured):5.36 g/cm3
Density (calculated):5.43 g/cm3

Crystallography of Artroeite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 6.27Å, b = 6.821Å, c = 5.057Å
α = 90.68°, β = 107.69°, γ = 104.46°
Ratio:a:b:c = 0.919 : 1 : 0.741
Unit Cell Volume: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}
X-Ray Powder Diffraction:
d-spacingIntensity
4.42 (100)
2.595 (70)
2.190 (65)
2.030 (50)
3.221 (40)
2.015 (40)
4.05 (35)
Comments:Recorded on material from Grand Reef Mine, Arizona, USA

Optical Data of Artroeite

Type:Biaxial (-)
RI values: nα = 1.629 nβ = 1.682 nγ = 1.691
2V:Measured: 41° to 42°, Calculated: 42°
Maximum Birefringence:δ = 0.062

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v, strong

Chemical Properties of Artroeite

Formula:
Pb[AlF
 
3
(OH)
 
2
]
Simplified for copy/paste:Pb[AlF3(OH)2]
Essential elements:Al, F, H, O, Pb
All elements listed in formula:Al, F, H, O, Pb
Analytical Data:Averages of ten electron microprobe analyses of type material; water content determined by thermogravimetry
PbO (67.5)
Al2O3 (15.6)
F (16.1)
H2O (6.0)
- O = F2 (6.8)

sum 98.4 wt.-%
Empirical Formula:
Pb
 
1.00
Al
 
1.01
F
 
2.80
(OH)
 
2.20

Relationship of Artroeite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
3.CC.05Gearksutite
Ca[Al(F,OH)
 
5
(H
 
2
O)]
3.CC.10Acuminite
Sr[AlF
 
4
(OH)(H
 
2
O)]
3.CC.10Tikhonenkovite
Sr[AlF
 
4
(OH)(H
 
2
O)]
3.CC.20Calcjarlite
Na(Ca,Sr)
 
3
Al
 
3
(OH)
 
2
F
 
14
3.CC.20Jarlite
Na(Sr,Na)
 
7
MgAl
 
6
F
 
32
(OH,H
 
2
O)
 
2
3.CC.20Jørgensenite
Na
 
2
(Sr,Ba)
 
14
Na
 
2
Al
 
12
F
 
64
(OH,F)
 
4

Other Names for Artroeite

Synonyms:
IMA1993-031
Other Languages:
German:Artroeit
Russian:Артроит
Spanish:Artroeita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Artroeite

Reference List:

- +
Kampf, A. R. and Foord, E. E. (1995): Artroeite, PbAlF3(OH)2, a new mineral from the Grand Reef mine, Graham Co., Arizona: description and crystal structure. American Mineralogist 80, 179-183.

Kampf, A. R. and Foord, E. E. (1996): Calcioaravaipaite, a new mineral, and associated lead fluoride minerals from the Grand Reef mine, Graham County, Arizona. Mineralogical Record 27, 293-300.

Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 25

Internet Links for Artroeite

Search Engines:
  • Look for Artroeite on Google
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  • External Links:
  • Look for Artroeite on Webmineral
  • Look for Artroeite on Athena Mineralogy
  • Look for Artroeite on Wikipedia
  • Look for Artroeite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Artroeite details from Handbook of Mineralogy (PDF)
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  • Lapis Mineral Magazin
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  • Localities for Artroeite

    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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Italy
     
    • Campania
      • Naples Province
        • Somma-Vesuvius Complex
    Enrico Bonacina
    Campostrini, I., Gramaccioli, C. (2005): Artroeite del Monte Somma-Vesuvio: secondo ritrovamento mondiale. Riv. Mineral. Ital., 29, 1: 50-52. ; M. Russo & I. Campostrini (2011): Ammineite, matlockite and post 1944 eruption fumarolic minerals at Vesuvius. Plinius 37, 312.
    USA
     
    • Arizona
      • Graham Co.
        • Aravaipa District
          • Santa Teresa Mts
            • Klondyke
              • Grand Reef Mountain
                • Laurel Canyon
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 120-121; Kampf, A.R. & E.E. Foord (1995), Artroeite, PbAlF3(OH)2, a new mineral from the Grand Reef mine, Graham Co., AZ: Description and crystal structure, Am.Min.: 80: 179-183; Min.Rec.: 27:293-300.
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