----- R170002 - RRUFF Database: Raman, X-ray, Infrared, and Chemistry

Humboldtine R170002

Name: Humboldtine
RRUFF ID: R170002
Ideal Chemistry: Fe²⁺(C₂O₄)·2H₂O
Locality: Zomba, Malawi
Source: Donald Doell [view label]
Owner: RRUFF
Description: Small yellow granular to short prismatic crystals with good cleavage on aegirine, associated with albite
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.

Mineral Groups: [ Humboldtine (3) ] [ Oxalate (13) ]

Quick search: [ All Humboldtine samples (2) ]

CHEMISTRY

RRUFF ID:	R170002.2
Sample Description:	Microprobe Fragment
Measured Chemistry:	EDS analysis only revealed Fe, with some Mn and Al.

RAMAN SPECTRUM

RRUFF ID:

Sample Description:

Unoriented sample

DOWNLOADS:

To download sample data,
please select a specific
orientation angle.

BROAD SCAN WITH SPECTRAL ARTIFACTS

RRUFF ID:

R170002

Wavelength:

Sample Description:

Unoriented sample

Instrument settings:

Thermo Almega XR 532nm @ 100% of 150mW

DOWNLOADS:

	Raman Data (Processed)
	RRUFF File

POWDER DIFFRACTION

RRUFF ID:

R170002.9

Sample Description:

Single crystal, powder profile is calculated

Cell Refinement Output:

a: 12.1245(61)Å b: 5.5160(24)Å c: 9.8582(40)Å
alpha: 90° beta: 128.240(16)° gamma: 90° Volume: 517.84(63)Å³ Crystal System: monoclinic

DOWNLOADS:

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

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