Raman spectroscopy of walpurgite

Frost, Ray L.; Weier, Matt L.; Čejka, Jiří; Kloprogge, J. Theo

doi:10.1002/jrs.1483

Cited by 60 publications

(22 citation statements)

References 23 publications

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“…In order to ensure that the correct spectra are obtained, the incident excitation radiation was scrambled. Previous studies by the authors provide more details of the experimental technique [11,12,15,17,[41][42][43][44][45][46][47].…”

Section: Raman Spectroscopymentioning

confidence: 99%

“…Indeed Raman spectroscopy has proven most useful for the study of diagenetically related minerals such as carbonates and hydroxycarbonate [14][15][16][17][18]. Some previous studies have been undertaken by the authors using Raman spectroscopy to study complex secondary minerals formed by crystallisation from concentrated sulphate solutions [12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermal analysis of smithsonite and hydrozincite

Hales

Frost

2008

J Therm Anal Calorim

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Abstract:Thermogravimetric analysis of synthetic smithsonite and hydrozincite, two secondary minerals of zinc, was used to determine their relative thermal stability. Thermal decomposition of smithsonite occurs at 293 °C and hydrozincite at 220 °C showing that the carbonate mineral is more stable than the hydroxy-carbonate mineral hydrozincite. Hot stage Raman spectroscopy confirms the decomposition of smithsonite and hydrozincite by 300 and 250 °C respectively. Thermogravimetry shows that a small amount of hydrozincite is formed during the synthesis of smithsonite. No evidence is found for the separate loss of the carbonate and hydroxyl units from hydrozincite.

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Section: Raman Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal analysis of smithsonite and hydrozincite

Hales

Frost

2008

J Therm Anal Calorim

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“…Indeed Raman spectroscopy has proven most useful for the study of diagenetically related minerals such as sulphates, alums and halotrichites [17][18][19][20][21] . Some previous studies have been undertaken by the authors using Raman spectroscopy to study complex secondary minerals formed by crystallisation from concentrated sulphate solutions [15][16][17][18][19][20][21][22][23][24] . In this work we extend this research by using Raman spectroscopy to study four natural halotrichites and compare the spectra with that of the natural minerals.…”

Section: Introductionmentioning

confidence: 99%

Natural halotrichites—an EDX and Raman spectroscopic study

Locke

Martens

Frost

2007

J Raman Spectroscopy

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Abstract:Raman spectroscopy has been used to characterise four natural halotrichites: halotrichite FeSO 4 .Al 2 (SO 4 ) 3 4 . Raman bands at around 474, 460 and 423 cm -1 are attributed to the ν 2 (A g ) SO 4 mode. The band at 618 cm -1 is assigned to the ν 4 (B g ) SO 4 mode. The splitting of the ν 2 , ν 3 and ν 4 modes is attributed to the reduction of symmetry of the SO 4 and it is proposed that the sulphate coordinates to water in the hydrated aluminium in bidentate chelation.Key words: apjohnite, pickingerite, halotrichite, wupatkiite, jarosite, sulphate, Raman spectroscopy Introduction Sulphate efflorescences have been known for some considerable time 1-3 . These often occur in tailings impoundments (see Jambour et al. p322) 4 . The sulphate formation results from the oxidation of pyrite. Halotrichites are formed close to pyrite and are often found with copiapites and related minerals 5 . The minerals are found in efflorescences of geothermal fields 6 . Halotrichite has a formula• Author for correspondence (r.frost@qut.edu.au)

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“…[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] Raman spectroscopy has proven most useful for the study of diagentically related minerals as often occurs with carbonate minerals. [30][31][32][34][35][36][37] No detailed Raman spectroscopic studies of the uranyl mineral voglite has been forth coming. Few Raman studies of any note are available.…”

Section: Introductionmentioning

confidence: 99%