Important Update News

The RRUFF Project has been migrated to RRUFF.net. Please update your bookmarks immediately, if you have not done so.

The data on this website is already three years out of date, and the entire website will be taken offline before the end of the year.

We are grateful to NASA for the funding of this effort.

Humboldtine R130689

Browse Search Results 
<< Previous |  Back to Search Results |  Next >> 
Record 1924 of 4216  


Name: Humboldtine
RRUFF ID: R130689
Ideal Chemistry: Fe2+(C2O4)·2H2O
Locality: Minas Gerais, Brazil
Source: Bob Jenkins [view label]
Owner: RRUFF
Description: Yellow prismatic, associated with tourmaline and quartz
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Mineral Groups: [ Humboldtine (3) ] [ Oxalate (13) ]
Quick search: [ All Humboldtine samples (2) ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented Raman on the primary sample
DOWNLOADS:

  To download sample data,
  please select a specific
  orientation angle.
Direction of polarization of laser relative to fiducial mark:
X Min:    X Max:    X Sort:
BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R130689
Wavelength:
Sample Description: Unoriented Raman on the primary sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
DOWNLOADS:

Raman Data (Processed)
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R130689.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 11.965(2)Å    b: 5.583(1)Å    c: 9.834(2)Å
alpha: 90°    beta: 128.24(3)°    gamma: 90°   Volume: 515.9(2)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.

DOWNLOADS:

DIF File
X-ray Data (XY - RAW) View Graph
RRUFF File
X Min:    X Max:    X Sort:
REFERENCES for Humboldtine

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]

de Rivero M (1821) Note sur une combinaison de l'acide oxalique avec le fer trouvé à Kolowserux, près Belin en Bohéme, Annales de Chimie et de Physique, 18, 207-210   [view file]

Mazzi F, Garavelli C (1957) La struttura della oxalite, FeC2O4·2H2O, Periodico di Mineralogia, 26, 269-303

Frost R L, Weier M L (2003) Raman spectroscopy of natural oxalates at 298 and 77 K, Journal of Raman Spectroscopy, 34, 776-785   [link]

Echigo T, Kimata M (2008) Single-crystal X-ray diffraction and spectroscopic studies on humboldtine and lindbergite: weak Jahn-Teller effect of Fe2+ ion, Physics and Chemistry of Minerals, 35, 467-475

Echigo T, Kimata M (2010) Crystal chemistry and genesis of organic minerals: A review of oxalate and polycyclic aromatic hydrocarbon minerals, The Canadian Mineralogist, 48, 1329-1358   [view file]

Piro O E, Baran E J (2018) Crystal chemistry of organic minerals-salts of organic acids: the synthetic approach, Crystallography Reviews, 24, 149-175