A Mössbauer study of the color of Roman pottery from the Leptiminus archaeological site, Tunisia

Sherriff, Barbara L.; McCammon, Catherine; Stirling, Lea

doi:10.1002/gea.10044

Cited by 6 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As the main iron-containing phases are hematite and maghemite, these are likely responsible for the reddish-brown colors. The color change into reddish is associated with the oxidation state of iron in oxides typical for fired earth (oxidation of Fe 3 O 4 to Fe 2 O 3 ) as described by Sherriff et al for ancient roman pottery [ 32 ]. According to X-ray photoelectron and Mössbauer spectroscopic characterization it could not be attributed to the change of the Fe 3+ fraction in hematite.…”

Section: Resultsmentioning

confidence: 99%

Towards the colonization of Mars by in-situ resource utilization: Slip cast ceramics from Martian soil simulant

et al. 2018

View full text Add to dashboard Cite

Here we demonstrate that by applying exclusively Martian resources a processing route involving suspensions of mineral particles called slurries or slips can be established for manufacturing ceramics on Mars. We developed water-based slurries without the use of additives that had a 51 wt. % solid load resembling commercial porcelain slurries in respect to the particle size distribution and rheological properties. These slurries were used to slip cast discs, rings and vases that were sintered at temperatures between 1000 and 1130 °C using different sintering schedules, the latter were set-up according the results of hot-stage microscopic characterization. The microstructure, porosity and the mechanical properties were characterized by SEM, X-ray computer tomography and Weibull analysis. Our wet processing of minerals yields ceramics with complex shapes that show similar mechanical properties to porcelain and could serve as a technology for future Mars colonization. The best quality parts with completely vitrificated matrix supporting a few idiomorphic crystals are obtained at 1130 °C with 10 h dwell time with volume and linear shrinkage as much as ~62% and ~17% and a characteristic compressive strength of 51 MPa.

show abstract

Section: Resultsmentioning

confidence: 99%

Towards the colonization of Mars by in-situ resource utilization: Slip cast ceramics from Martian soil simulant

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Among these, in the so-called 'site 290', on a ridge at the eastern edge of the ancient town, a complex of five twostoreyed circular kilns was brought to light in 1995e1998 (Stirling et al, 2001). LAP project has allowed a deeper knowledge of Leptiminus and several studies has been published about the site (Sherriff et al, 2002a and2002b;Keenleyside et al, 2009).…”

Section: Leptiminusmentioning

confidence: 99%

Archaeomagnetic data from four Roman sites in Tunisia

Casas¹,

Ouazaa²,

Álvarez³

2012

Journal of Archaeological Science

View full text Add to dashboard Cite

“…En casos favorables se puede establecer la coordinación de Fe y las propiedades magnéticas inducidas por la presencia de Fe en la estructura. Las investigaciones que se han hecho mediante EM sobre arcillas o productos de estas, como los cerámicos muestran aportes significativos, un caso en particular fue explorado por Sherriff et al, (2002), quienes observaron detalladamente los cambios de color en la arcilla argumentando que la tonalidad rojiza que toman algunos cerámicos se debe al aumento de hematita a medida que se calienta dicha arcilla. Otras tonalidades como por ejemplo el color blanco se asocian a minerales de arcilla que no contienen óxidos de Fe (hematita, maghemita), pero si tienen incorporados cationes de Fe en fases de silicatos los cuales provocan la falta de color.…”

Section: Introductionunclassified

Evolución De Fases Magnéticas Presentes en Arcillas De Boyacá Sometidas a Altas Temperaturas

Guerrero

Ovalle

Lagos

2016

I2+D

View full text Add to dashboard Cite

ResumenEn este trabajo analizamos muestras de arcilla obtenidas de la región de Tunja -Boyacá, con el objetivo de estudiar el efecto de la temperatura de calentamiento en el color de estos materiales y a la vez como indicativo de la naturaleza y la distribución de sus constituyentes de óxidos de hierro Fe 2 O 3 . Estos colores son de relevancia estética en la fabricación de cubiertas y ladrillos en construcción de viviendas. Para evaluar la evolución de las fases, su composición y microestructura en las muestras se utilizó Fluorescencia de rayos X (XRF), Difracción de rayos X (DRX), Espectroscopia Mössbauer (EM) y Microscopia electrónica de barrido (SEM) para muestras sometidas a tratamiento térmico entre (400-1200 ⁰C). Los resultados indican que las propiedades espectrales de las muestras están influenciadas principalmente por la mineralogía del Fe. Se identificaron fases de goetita y hematita en todas las muestras. Los análisis Mössbauer indicaron que con el incremento de la temperatura, la arcilla natural presenta un aumento en la fase de hematita que se refleja también en un incremento del tono rojo del cuerpo de la misma, en contraste con muestras de tono amarillo de la arcilla natural. La formación de hematita y el aumento en su ordenamiento magnético se debe en gran parte a la desaparición de la materia orgánica y la transformación de iones de hierro dispuestos en las fases mineralógicas de la arcilla natural.Palabras clave: Espectroscopia Mössbauer, fases de hierro, hematita, calentamiento, mineralogía. AbstractIn this paper we analyze clay samples obtained from the region of Tunja Boyacá to study the effect of heating temperature in the color of these materials and at the same time as indicative of the nature and distribution of constituents iron oxide Fe 2 O 3 . These colors are of decorative importance in the manufacture of roofing and brick housing construction. X-ray Fluorescence (XRF), X-ray Diffraction (XRD), Mössbauer Spectroscopy (MS) and Scanning Electron Microscopy (SEM) for samples subjected to heat treatment between (400-1200 ⁰C) was used to assess the evolution of the phases and microstructure in the samples. The results indicate that the spectral properties of the samples are influenced primarily by the mineralogy of Fe. Goethite and hematite phases were identified in all samples. Mössbauer analyzes indicated that with increasing temperature of the raw clay presents an increase in phase of hematite and the red tone from the body of the same, in contrast to samples of yellow tone natural clay . Hematite formation and increased its magnetic ordering is largely due to the disappearance of organic matter and the oxidation of iron ions arranged in mineralogical phases of raw clay.

show abstract

A Mössbauer study of the color of Roman pottery from the Leptiminus archaeological site, Tunisia

Cited by 6 publications

References 27 publications

Towards the colonization of Mars by in-situ resource utilization: Slip cast ceramics from Martian soil simulant

Towards the colonization of Mars by in-situ resource utilization: Slip cast ceramics from Martian soil simulant

Archaeomagnetic data from four Roman sites in Tunisia

Evolución De Fases Magnéticas Presentes en Arcillas De Boyacá Sometidas a Altas Temperaturas

Contact Info

Product

Resources

About