Magnesioalterite R180015

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Name: Magnesioalterite
RRUFF ID: R180015
Ideal Chemistry: Mg2Fe3+4(SO4)4(C2O4)2(OH)4·17H2O
Locality: Near Marble Canyon, Coconino County, Arizona, USA
Source: Malcom Alter
Owner: RRUFF
Description: Isolated or aggregates of yellow brown prismatic crystals on petrified wood, associated with greenish prismatic alterite, gypsum, alunogen, and sulfur. Type sample.
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Groups: [ Alterite (2) ] [ Oxalate (13) ]
CHEMISTRY 
RRUFF ID: R180015.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Mg0.74Zn0.60Fe2+0.58Mn0.09)Fe3+4(SO4)4.0(C2O4)2.0(OH)4.0ยท17H2O
Microprobe Data File: [ Download Excel File ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented Raman on the primary sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R180015
Wavelength:
Sample Description: Unoriented Raman on the primary sample
Instrument settings: Thermo Almega XR 532nm @ 25% of 150mW
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Raman Data (RAW) View Graph
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R180015
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 16.7656(15)Å    b: 9.4074(7)Å    c: 25.351(3)Å
alpha: 90°    beta: 108.258(5)°    gamma: 90°   Volume: 3797.1(6)Å3    Crystal System: monoclinic
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REFERENCES for Magnesioalterite

Miyawaki R, Hatert F, Pasero M, Mills S J (2020) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) Newsletter 57, Mineralogical Magazine, 84, 791-794   [view file]