Manganite R070269
Name: Manganite
RRUFF ID: R070269
Ideal Chemistry: Mn3+O(OH)
Locality: Wessels mine, Hotazel, Kalahari manganese field, Northern Cape Province, South Africa
Source: Michael Scott S102942 [view label]
Owner: RRUFF
Description: Divergent black acicular crystals (with dark brown lights) associated with gaudefroyite in gypsum cleavage plate
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Rutile (23) ]
Quick search: [ All Manganite samples (3) ]
CHEMISTRY 
RRUFF ID: R070269.2
Sample Description: Microprobe Fragment
Measured Chemistry: lighter phase: (Mn3+0.99Fe3+0.01)Σ=1O(OH) ; trace amounts of Cr and Ca; OH by difference; darker phase: gypsum
Microprobe Data File: [ Download Excel File ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R070269
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: R070269.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 5.306(1)Å    b: 5.258(2)Å    c: 5.303(2)Å
alpha: 90°    beta: 114.13(2)°    gamma: 90°   Volume: 135.05(8)Å3    Crystal System: monoclinic
  File Type Information Close
Calculated diffraction file.

  File Type Information Close
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 Manganite

American Mineralogist Crystal Structure Database Record: [view record]

Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file]

Haidinger W (1826) On the crystalline forms and properties of the manganese ores, The Edinburgh Journal of Science, 4, 41-50   [view file]

Turner E (1828) Chemical examination of the oxides of manganese. Part II. On the composition of the ores of manganese described by Mr. Haidinger, The Philosophical Magazine, 4, 96-104   [view file]

Larsen E S (1921) The microscopic determination of the nonopaque minerals, U.S. Geological Survey Bulletin, 671, 5-294   [view file]

Buerger M J (1936) The symmetry and crystal structure of manganite, Mn(OH)O, Zeitschrift für Kristallographie, 95, 163-174   [view file]

Kohler T, Armbruster T, Libowitzky E (1997) Hydrogen bonding and Jahn-Teller distortion in groutite, α-MnOOH, and manganite, γ-MnOOH, and their relations to the manganese dioxides ramsdellite and pyrolusite, Journal of Solid State Chemistry, 133, 486-500

Suzuki A (2013) Compression behavior of manganite, Journal of Mineralogical and Petrological Sciences, 108, 295-299

Post J E, McKeown D A, Heaney, P J (2020) Raman spectroscopy study of manganese oxides: Tunnel structures, American Mineralogist, 105, 1175-1190   [view file]