Guanacoite R060811

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Name: Guanacoite
RRUFF ID: R060811
Ideal Chemistry: Cu2Mg3(OH)4(AsO4)2·4H2O
Locality: Guanaco mine, Tal Tal, Chile
Source: Bob Jenkins [view label]
Owner: RRUFF
Description: Tufts of light blue acicular crystals
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ Akrochordite (2) ]
CHEMISTRY 
RRUFF ID: R060811.2
Sample Description: Microprobe Fragment
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R060811
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
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Raman Data (RAW) View Graph
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R060811.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 5.480(6)Å    b: 16.79(3)Å    c: 6.87(1)Å
alpha: 90°    beta: 100.69(7)°    gamma: 90°   Volume: 621.3(4)Å3    Crystal System: monoclinic
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Calculated diffraction file.

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Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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DIF File
X-ray Data (XY - RAW) View Graph
RRUFF File
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REFERENCES for Guanacoite

American Mineralogist Crystal Structure Database Record: [view record]

Witzke T, Kolitsch U, Krause W, Wiechowski A, Medenbach O, Kampf A R, Steele I M, Favreau G (2006) Guanacoite, Cu2Mg2(Mg0.5Cu0.5)(OH)4(H2O)4(AsO4)2, a new arsenate mineral species from the El Guanaco Mine, near Taltal, Chile: description and crystal structure, European Journal of Mineralogy, 18, 813-821   [view file]

Kyono A (2008) Compositional variability and crystal structural features of guanacoite, American Mineralogist, 93, 501-507   [view file]

Bosi F, Miyawaki R, Hatert F, Pasero M, Mills S J (2023) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) Newsletter 71, Mineralogical Magazine, 87, 332-335   [view file]

Bosi F, Miyawaki R, Hatert F, Pasero M, Mills S J (2023) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 71, European Journal of Mineralogy, 35, 75-79   [view file]