Congolite R070149

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Record 919 of 4216  

Name: Congolite
RRUFF ID: R070149
Ideal Chemistry: Fe2+3B7O13Cl
Locality: Lower Saxony, Germany
Source: James Shigley [view label]
Owner: RRUFF
Description: Light brown pseudocubic crystal
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Boracite (9) ]
Quick search: [ All Congolite samples (2) ]
RRUFF ID: R070149.2
Sample Description: Microprobe Fragment
Measured Chemistry: light core: (Fe2+2.32Mg0.52Mn0.16)Σ=3B7O13Cl1.00 ; gray rim: (Fe2+2.16Mg0.77Mn0.17)Σ=3B7O13Cl1.00 ; B estimated by difference and stoichiometry
Microprobe Data File: [ Download Excel File ]
Sample Description: Unoriented sample

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RRUFF ID: R070149
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
RRUFF ID: R070149.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 8.6023(9)Å    b: 8.6023(9)Å    c: 21.047(3)Å
alpha: 90°    beta: 90°    gamma: 120°   Volume: 1348.8(3)Å3    Crystal System: hexagonal
  File Type Information Close
Calculated diffraction file.

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Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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REFERENCES for Congolite

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]

Fleischer M (1972) New mineral names, American Mineralogist, 57, 1311-1317   [view file]

Wendling E, Hodenberg R V, Kühn R (1972) Congolit, der trigonale Eisenboracit, Kali und Steinsalz, 6, 1-3

Dowty E, Clark J R (1973) Crystal-structure refinements for orthorhombic boracite, Mg3B7O13Cl, and a trigonal, iron-rich analogue, Zeitschrift für Kristallographie, 138, 64-99   [view file]

Nelmes R J (1974) Structural studies of boracites. A review of the properties of boracites, Journal of Physics C: Solid State Physics, 7, 3841-3855

Mendoza-Alvarez M E, Yvon K, Depmeier W, Schmid H (1985) Structure refinement of trigonal iron-chlorine boracite, Acta Crystallographica, C41, 1551-1552

Burns P C (1995) X-ray powder diffraction data for the identification of boracite-group minerals, Powder Diffraction, 10, 250-260

Burns P C, Carpenter M A (1996) Phase transitions in the series boracite – trembathite – congolite: phase relations, The Canadian Mineralogist, 34, 881-892   [view file]

Burns P C, Carpenter M A (1997) Phase transitions in the series boracite – trembathite – congolite: an infrared spectroscopic study, The Canadian Mineralogist, 35, 189-202   [view file]

Grice J D, Gault R A, Van Velthuizen J (2005) Borate minerals of the Penobsquis and Millstream deposits, southern New Brunswick, Canada, The Canadian Mineralogist, 43, 1469-1487   [view file]

Wachowiak J, Pieczka A, (2012) Congolite and trembathite from the Kłodawa Salt Mine, Central Poland: records of the thermal history of the parental salt dome, The Canadian Mineralogist, 50, 1387-1399   [view file]