Braccoite R220040

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Record 558 of 4133  

Name: Braccoite
RRUFF ID: R220040
Ideal Chemistry: NaMn2+5[Si5O14(OH)](AsO3)(OH)
Locality: Valletta mine, Maira Valley, Piedmont, Italy
Source: Fernando Cámara
Owner: Fernando Cámara
Description: Subhedral crystals in brownish-red thin masses. Type sample reported in Cámara et al (2015)
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ Saneroite (2) ]
CHEMISTRY 
RRUFF ID: R220040.2
Sample Description: Microprobe Fragment
Measured Chemistry: Na1.06(Mn2+4.46Mn3+0.32Mg0.19Al0.01Ca0.01)[(Si5.36As5+0.48V5+0.15)O17(OH)](OH0.98F0.02)
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
Instrument settings: Jobin-Yvon Horiba Labram 632nm @ 100% of 20mW
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R220040
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Jobin-Yvon Horiba Labram 632nm @ 100% of 20mW
POWDER DIFFRACTION 
RRUFF ID: R220040
Sample Description: Calculated powder profile
Cell Refinement Output: a: 9.756(6)Å    b: 9.961(7)Å    c: 9.087(7)Å
alpha: 92.23(5)°    beta: 117.27(5)°    gamma: 105.21(4)°   Volume: 742.2(9)Å3    Crystal System: unknown
  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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REFERENCES for Braccoite

American Mineralogist Crystal Structure Database Record: [view record]

Williams P A, Hatert F, Pasero M, Mills S J (2013) IMA Commission on new minerals, nomenclature and classification (CNMNC) Newsletter 18. New minerals and nomenclature modifications approved in 2013, Mineralogical Magazine, 77, 3249-3258   [view file]

Cámara F, Bittarello E, Ciriotti M E, Nestola F, Radica F, Marchesini M (2015) As-bearing new mineral species from Valletta mine, Maira Valley, Piedmont, Italy: II. Braccoite, NaMn2+5[Si5AsO17(OH)](OH), description and crystal structure, Mineralogical Magazine, 79, 171-189   [view file]

Belakovskiy D I, Uvarova Y, Gagne O C (2016) New mineral names, American Mineralogist, 101, 1012-1019   [view file]