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Bernardevansite R210010

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Name: Bernardevansite
RRUFF ID: R210010
Ideal Chemistry: Al2(Se4+O3)3·6H2O
Locality: El Dragon, Potosi, Bolivia
Source: Bob Jenkins [view label]
Owner: RRUFF
Description: Aggregates or spheres of pale grey, radiating acicular crystals, associated with chalcomenite and clinochalcomenite.
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Mandarinoite (3) ]
CHEMISTRY 
RRUFF ID: R210010.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Al1.26Fe3+0.82)Σ2.08(Se0.98O3)3·6H2O, calculated on the basis of 15 O apfu.
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented Raman on the primary sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R210010
Wavelength:
Sample Description: Unoriented Raman on the primary 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: R210010
Sample Description: Powder
Cell Refinement Output: a: 16.535(1)Å    b: 7.7762(5)Å    c: 9.8841(6)Å
alpha: 90°    beta: 98.337(7)°    gamma: 90°   Volume: 1257.5(5) Å3    Crystal System: monoclinic
  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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

American Mineralogist Crystal Structure Database Record: [view record]

Miyawaki R, Hatert F, Pasero M, Mills S J (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) - Newsletter 70, European Journal of Mineralogy, 34, 591-601   [view file]

Yang H, Gu X, Jenkins R A, Gibbs R B, Downs R T (2023) Bernardevansite, Al2(Se4+O3)3⋅6H2O, dimorphous with alfredopetrovite and the Al-analogue of mandarinoite, from the El Dragón mine, Potosí, Bolivia, Mineralogical Magazine, 87, 407-414   [view file]