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Name: Ramsdellite RRUFF ID: R050552 Ideal Chemistry: MnO2 Locality: Lake Valley, Sierra County, New Mexico, USA Source: Dave Bunk Minerals Owner: RRUFF Description: Black bladed crystals Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis. |
Mineral Group: [ Ramsdellite (2) ] |
CHEMISTRY | ||||||||
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RAMAN SPECTRUM | ||||||||||||
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BROAD SCAN WITH SPECTRAL ARTIFACTS | ||||||||||||
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INFRARED SPECTRUM (Attenuated Total Reflectance) | |||||||||||||
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POWDER DIFFRACTION | ||||||
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RRUFF ID: | R050552.1 | |||||
Sample Description: | Powder, cell parameters are from single crystal | |||||
Cell Refinement Output: |
a: 9.26(2)Å b: 2.840(5)Å c: 4.557(9)Å alpha: 90° beta: 90° gamma: 90° Volume: 119.8(3)Å3 Crystal System: orthorhombic |
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REFERENCES for Ramsdellite | |
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American Mineralogist Crystal Structure Database Record: [view record] |
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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] |
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Ramsdell L S (1932) An X-ray study of psilomelane and wad, American Mineralogist, 17, 143-149 [view file] |
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Fleischer M, Richmond W E (1943) The manganese oxide minerals: a preliminary report, Economic Geology, 38, 269-286 [view file] |
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Fleischer M (1943) New mineral names, American Mineralogist, 28, 615-615 [view file] |
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Fleischer M, Richmond W E, Evans H T (1962) Studies of the manganese oxides. V. Ramsdellite, MnO2, an orthorhombic dimorph of pyrolusite, American Mineralogist, 47, 47-58 [view file] |
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Majmundar H H (1969) Ramsdellite and groutite from Nova Scotia, The Canadian Mineralogist, 9, 718-720 [view file] |
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Potter R M, Rossman G R (1979) The tetravalent manganese oxides: identification, hydration, and structural relationships by infrared spectroscopy, American Mineralogist, 64, 1199-1218 [view file] |
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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 |
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Post J E, Heaney P J (2004) Neutron and synchrotron X-ray diffraction study of the structures and dehydration behaviors of ramsdellite and "groutellite", American Mineralogist, 89, 969-975 [view file] |
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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] |
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