Wesselsite R120019
Name: Wesselsite
RRUFF ID: R120019
Ideal Chemistry: SrCuSi4O10
Locality: Wessels mine, Kalahari manganese field, Northern Cape Province, South Africa
Source: William W. Pinch [view label]
Owner: RRUFF
Description: Dark blue massive, associated with R120057 lavinskyite and R120077 scottyite
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Gillespite (5) ]
CHEMISTRY 
RRUFF ID: R120019.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Sr0.98Ba0.04)Cu1.05Si3.97O10 ; (wesselsite is medium gray material in image, associated with samples R120057 lavinskyite, dark grey; and R120077 scottyite, light grey)
Microprobe Data File: [ Download Excel File ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented Raman on the primary sample, the 780 spectrum is overwhelmed by fluorescence.
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R120019
Wavelength:
Sample Description: Unoriented Raman on the primary sample, the 780 spectrum is overwhelmed by fluorescence.
Instrument settings: Thermo Almega XR 532nm @ 10% of 150mW
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Raman Data (RAW) View Graph
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R120019.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 7.3819(7)Å    b: 7.3819(7)Å    c: 15.658(2)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 853.3(1)Å3    Crystal System: tetragonal
  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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DIF File
X-ray Data (XY - RAW) View Graph
RRUFF File
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REFERENCES for Wesselsite

American Mineralogist Crystal Structure Database Record: [view record]

Chakoumakos B C, Fernandez-Baca J A, Boatner L A (1993) Refinement of the structures of the layer silicates MCuSi4O10 (M=Ca, Sr, Ba) by Rietveld analysis of neutron powder diffraction data, Journal of Solid State Chemistry, 103, 105-113

Giester G, Rieck B (1996) Wesselsite, SrCu[Si4O10], a further new gillespite-group mineral from the Kalahari Manganese Field, South Africa, Mineralogical Magazine, 60, 795-798   [view file]

Jambor J L, Puziewicz J, Roberts A C (1997) New mineral names, American Mineralogist, 82, 620-624   [view file]

Knight K S, Henderson C M B (2007) Structural basis for the anomalous low-temperature thermal expansion behaviour of the gillespite-structured phase Ba0.5Sr0.5CuSi4O10, European Journal of Mineralogy, 19, 189-200

Knight K S, Henderson C M B, Clark S M (2010) Structural variations in the wesselsite-effenbergerite (Sr1-xBaxCuSi4O10) solid solution, European Journal of Mineralogy, 22, 411-423

Rieck B, Pristacz H, Giester G (2015) Colinowensite, BaCuSi2O6, a new mineral from the Kalahari Manganese Field, South Africa and new data on wesselsite SrCuSi4O10, Mineralogical Magazine, 79, 1769-1778   [view file]