Strontianite Raman spectrum

The Strontianite Raman spectrum and its interpretation are presented below.


Strontianite sample data

Description: Strontianite mineral sample
Mineral: Strontianite
RAMAN ID: RAMAN5432
Ideal chemistry: SrCO3
Source: Grigore Cobălcescu Museum
Locality: Drensteinfurt – Germany
Owner: Department of Geology – Alexandru Ioan Cuza University of Iasi

Strontianite sample image

Strontianite Raman spectrum

Raman spectrum of Strontianite


Main Raman bands of Strontianite

Wavenumbers (cm-1): 1069vs, 700w, 242m

Raman parameters

Instrument settings: Raman spectrograph HE 532nm (Horiba Jobin-Yvon)
Spectral resolution: 2 cm-1
Conditions of measurement: at room temperature

Interpretation of Raman spectrum of Strontianite

The characteristic Raman band due to the external vibration mode (M-CO3) at 242 cm-1, and the ν1 internal mode (symmetric stretching) at 1069 cm-1 are easily distinguished. In the Raman spectrum of the strontianite sample don’t have values below 200 cm-1 because the spectral range is between 200-3400 cm-1.

This spectrum is governed by the very strong Raman line (1069 cm-1) atributed to the ν1 symmetric stretching mode of the carbonate group. The ν4 mode of CO3 has values at 700 cm-1. The ν2 vibration mode is not observed in this study; ν3 vibration are observed at 1445 and 1543 cm-1.

The frequencies of all Raman bands observed in Strontianite, Aragonite and Witherite can not be corelated with the atomic masses of the cations.

Buzgar and Apopei, 2009 Krishnamurti, 1960 Assignment
242 246 T(Sr,CO3)
700 701
711
ν4 symmetric deformation
NO 855 ν2 asymmetric deformation
1069 1074 ν1 symmetric stretch
1445
1543
1408
1438
1447
ν3 asymmetric stretching

NO = not observed.

References for the Raman spectrum of Strontianite

  • BUZGAR N., APOPEI A. I. (2009) – The Raman study on certain carbonates. Analele Stiintifice ale Universitatii “Al. I. Cuza” – Iasi, Tome 55, issue 2, 97-112 [link]
  • KRISHNAMURTI D. (1960) – The Raman spectra of aragonite, strontianite and witherite. Indian Academy of Sciences [link]

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