Important Update News
rruff.info is being updated to improve its interface and content. The beta version of the update is accessible to the public at www.rruff.net. New data is only being added to the beta site. Please note that it is in development, and some components are not functional. Once released, the address will revert to RRUFF.info.
We are grateful to NASA for the funding of this effort.
![]() |
![]() |
Name: Lepidocrocite RRUFF ID: R050454 Ideal Chemistry: Fe3+O(OH) Locality: Malvern, Chester County, Pennsylvania, USA Source: University of Arizona Mineral Museum 16088 [view label] Owner: RRUFF Description: Aggregate of red-brown flattened and platy crystals Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis |
Mineral Group: [ Lepidocrocite (3) ] |
CHEMISTRY | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
![]() |
|
RAMAN SPECTRUM | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
BROAD SCAN WITH SPECTRAL ARTIFACTS | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
INFRARED SPECTRUM (Attenuated Total Reflectance) | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
POWDER DIFFRACTION | ||||||||
---|---|---|---|---|---|---|---|---|
RRUFF ID: | R050454.1 | |||||||
Sample Description: | Powder | |||||||
Cell Refinement Output: |
a: 12.4682(7)Å b: 3.8584(5)Å c: 3.064(1)Å alpha: 90° beta: 90° gamma: 90° Volume: 147.40(5)Å3 Crystal System: orthorhombic |
|||||||
|
|
REFERENCES for Lepidocrocite | |
---|---|
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] |
|
Hausmann J F L (1813) Schuppig- fafriger, 1, in Handbuch der Mineralogie Bandenhoect und Ruprecht Göttingen 269-269 [view file] |
|
Ullmann J C (1814) IV. Metallische Fossilien. 260. Lepidokrokit, in Systematisch-Tabellarische Uebersicht der Mineralogisch-Einfachen Fossilien Cassel und Marburg 148-148 [view file] |
|
Posnjak E, Merwin H E (1919) The hydrated ferric oxides, American Journal of Science, 47, 311-348 [view file] |
|
Bernal J D, Dasgupta D R, Mackay A L (1959) The oxides and hydroxides of iron and their structural inter-relationships, Clay Minerals Bulletin, 4, 15-30 |
|
Fleischer M, Cabri L J, Nickel E H, Pabst A (1977) New mineral names, American Mineralogist, 62, 593-600 [view file] |
|
International Mineralogical Association (1980) International Mineralogical Association: Commission on new minerals and mineral names, Mineralogical Magazine, 43, 1053-1055 [view file] |
|
Christensen A N, Lehmann M S, Convert P (1982) Deuteration of crystalline hydroxides. Hydrogen bonds of ϒ-AlOO(H,D) and ϒ-FeOO(H,D), Acta Chemica Scandinavica, A 36, 303-308 |
|
Banin A, Ben-Shlomo T, Margulies L, Blake D F, Mancinelli R L (1993) The nanophase iron mineral(s) in Mars soil, Journal of Geophysical Research, 98, 20831-20853 |
|
de Faria D L A, Silva S V, de Oliveira M T (1997) Raman microspectroscopy of some iron oxides and oxyhydroxides, Journal of Raman Spectroscopy, 28, 873-878 [link] |
|
Oh S J, Cook D C, Townsend H E (1998) Characterization of iron oxides commonly formed as corrosion products on steel, Hyperfine Interactions, 112, 59-65 [link] |
|
Zhukhlistov A P (2001) Crystal structure of lepidocrocite FeO(OH) from the electron-diffractometry data, Crystallography Reports, 46, 730-733 [view file] |
|
Shannon R D, Shannon R C, Medenbach O, Fischer R X (2002) Refractive index and dispersion of fluorides and oxides, Journal of Physical and Chemical Reference Data, 31, 931-970 [view file] |
|
Frankel R B, Bazylinski D A (2003) Biologically induced mineralization by bacteria, Reviews in Mineralogy and Geochemistry, 54, 95-114 |
|
|