Goslarite Raman spectra - Romanian Database of Raman Spectroscopy

Formula:	ZnSO₄•7(H₂O)
Crystal Data:	Crystal System: Orthorhombic - Disphenoidal
	Point Group: 2 2 2
Cell Data:	Space Group: P 2₁2₁2₁, a = 11.8176, b = 12.0755, c = 6.827, Z = 4
	Density (calc.) = 1.96 and V = 974.24 Å³

Synthetic sample

Click image to enlarge



Element color: S, O Toggle Grid Toggle Coordinates Reverse Spectrum				Click to in the Raman spectrum. To see the vibrations click on one of them (highlight region) and it (the selected vibration) will appear on the right side of the Raman spectrum. Below spectra are various settings, and other vibrations of goslarite (which are not present in this spectrum). You have the possibility to zoom in the spectrum by selecting a spectral region you need to be increased (along axis x); to zoom keep the left mouse-click continously pressed, drag (to left or to right) and release the left button. To return to the initial size spectrum, press the right click on the spectrum -> Zoom -> Reset View.
Model type: Sticks Ball-and-Sticks (1) Ball-and-Sticks (2) CPK (Spacefill) Orientation: Reset view Front view Back view Left view Right view Top view Bottom view	Background color: Reset White(1) Black Spin on Spin off Symbols on Symbols off SO₄ polyhedra on SO₄ polyhedra off	Vibrations: ν₂ SO₄ ν₄ SO₄ ν₁ SO₄ ν₃ SO₄ Vibration on Vibration off	Download spectrum: Raman spectrum .txt Raman spectrum .spc Vectors on Vectors off Measure distances Delete measure Axes on Axes off

In the case of goslarite, the Raman spectrum is more complex. The characteristic bands for sulfate group vibrations were found at: 1024 cm^-1 for the ν₁ mode; at 423 cm^-1 and 510 cm^-1 for the ν₂ mode; at 1084 cm^-1 and 1191 cm^-1 for the ν₃ mode and at 626 cm^-1 and 671 cm^-1 for the ν₄ mode. The peaks from the lower region of the spectrum, at the 223 cm^-1 and 281 cm^-1, were attributed to the translational modes of the cation with the oxygen from water. The band 1492 cm^-1 was assigned to the ν₂ bending mode of water molecule. Modes of O-H stretching were not observed in this study. The band at the wavenumber 913 cm^-1 was attributed to vibrational modes of water molecules (Berger, 1976; Chio et al., 2007). The Raman spectra obtained in this study is very different from those mentioned in the literature (Shantakumari, 1953).

Goslarite		Assignments
Buzgar et al., 2009¹	Shantakumari, 1953	Assignments
223	252	T(M, H₂O)
281	373	T(M, H₂O)
423	445	ν₂ SO₄
510	461	ν₂ SO₄
626	609	ν₄ SO₄
671	620	ν₄ SO₄
913		ν(H₂O)
1024	990	ν₁ SO₄
	1057	ν₃ SO₄
1084	1062
	1094
	1121
	1141
1191
1492		ν(H₂O)
	3154
	3342
	3436
	3512

• The Mineralogy Database [link]

• Crystal data (.cif file) from the American Mineralogist Crystal Structure Database [link]

• ¹BUZGAR N., BUZATU A., SANISLAV I. V. (2009) - The Raman study on certain sulfates. Analele Stiintifice ale Universitatii “Al. I. Cuza” - Iasi, Tome 55, issue 1, 5-23 [link]

• Berger, J. (1976) - Infrared and Raman spectra of CuSO₄•5H₂O; CuSO₄•5D₂O; and CuSeO₄•5H₂O. Journal of Raman Spectroscopy, 5, 103-114. [link]

• Chio, C. H., Sharma, S. K., Muenow, D. W. (2007) - The hydrates and deuterates of ferrous sulfate (FeSO₄): a Raman spectroscopic study. Journal of Raman Spectroscopy, 38, 87-99.[link]

• Shantakumari, C. (1953) - Raman spectra of crystalline sulphates of zinc, magnesium and sodium. Proceedings of the Indian Academy of Science A, 37, 393-399. [link]

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Goslarite: Crystal structure | Sample photo | Raman spectrum | Interpretation | References