Jahnsite-(CaMnMn) R080072
Name: Jahnsite-(CaMnMn)
RRUFF ID: R080072
Ideal Chemistry: CaMn2+Mn2+2Fe3+2(PO4)4(OH)2·8H2O
Locality: Tip Top mine, Custer Country, South Dakota, USA
Source: Tom Loomis TL-42 [view label]
Owner: RRUFF
Description: Pale yellow blocky to thick tabular crystals associated with scholzite, R080068
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
CHEMISTRY 
RRUFF ID: R080072.2
Sample Description: Microprobe Fragment
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R080072
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
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Raman Data (Processed)
RRUFF File
Raman Data (RAW) View Graph
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R080072.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 14.81(2)Å    b: 7.158(7)Å    c: 9.873(9)Å
alpha: 90°    beta: 108.31(4)°    gamma: 90°   Volume: 994(1)    Crystal System: monoclinic
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REFERENCES for Jahnsite-(CaMnMn)

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]

Moore P B, Araki T (1974) Jahnsite, CaMn2+Mg2(H2O)8Fe8+2(OH)2[PO4]4: A novel stereoisomerism of ligands about octahedral corner-chains, American Mineralogist, 59, 964-973   [view file]

Grice J D, Dunn P J, Ramik R A (1990) Jahnsite-(CaMnMn), a new member of the whiteite group from Mangualde, Beira, Portugal, American Mineralogist, 75, 401-404   [view file]