A MÖSSBAUER STUDY OF ANCIENT POTTERY IRON EASTERN SLOVAKIA

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A MÖSSBAUER STUDY OF ANCIENT POTTERY IRON EASTERN SLOVAKIA

J. Sitek, M. Hucl, A. Brezina

To cite this version:

J. Sitek, M. Hucl, A. Brezina. A MÖSSBAUER STUDY OF ANCIENT POTTERY IRON EASTERN SLOVAKIA. Journal de Physique Colloques, 1980, 41 (C1), pp.C1-403-C1-404.

�10.1051/jphyscol:19801155�. �jpa-00219641�

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JOURNAL DE PHYSIQUE Colloque Cl , supplkment au n ^O1, Tome 41, janvier 1980, page (21-403

A ~ S S B A U E R S T U N OF ANCIENT POllERY IRON EASTERN SLOVAKIA

J. S i t e k , M. Hucl and A . ~ r e z i n a *

Department of Uuclear Physics and Technics, Slovak Technical University, Vazovoua 5, Bratis Lava, Czechoslovakia.

x I n s t i t u t e of ArcheoZogy, Slovak Academy of Science Nitra, Czechoslovakia.

Introduction

Manufacturing techniques and trade po- ttery in the ancient world are of great archeological interest to provide infor- mation about technologi.ca1 level of va- rious cultures

.

Amoag analytical methods usually used in material science the Mbss- bauer spectroscopy at present is sn inte- resting way to obtain informations on the chemical and physical state of the iron.

These informations obtained from Messba- ner spectra on the pottery may to deter- mine the provenance and the manufacture of pottery.

The studied material was a n ancient pot- tery from the locality of the Eastern Slovakia. On the basis of aroheologi~al evidence this pottery belong to linear ceramic. Their age was estimated at about 10000 yers.

Experiments and results

We have investigated samples aproximately of the same age. Samples had various co- lor in inside and on the $m@z&~ae. We suppo- sed that &Bgfneps - contain a rest of the paint. The problem was to determine whe-

ther the surface layer contain a paint.

The samples w e m prepared from the pow- der separed from the inside and and from the surface at the room temperature with a spectrometer operating in the coastant acceleration mode. The source was 5 7 ~ 0

in rhodium matrix. Mbssbauer spectrum from the inside the sample is in Fig.1.

There are two components in the spectrum.

The first (1) corresponds to ferric qua- drupole dublet ( A

=

^0,726^mms-l) the se-

Fig. 1. Mbssbauer spectmum of sample from the inside the pottery

Fig. 2 , Mbssbauer spectrum of sample from the surface the pottery

Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphyscol:19801155

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C 1-404 JOURNAL DE PHYSIQUE

cond (2) to ferrous qaudropole dublet

( A =

^2,26^lrrms-l) this spectrum represend.

ts a typical clay minerd containing ~ e ~ + in ootahedral or tetrahedral enviroments

111.

The e h a g e s occuring on MIssbataer speotra of olay minerals after a p r o m s &

ve heating give, use full information of the behaviour of iron in ootahedral or tetrahedral coordination.

The effeat of fir- the olay upon the Mbssbauer speotra was demonstrated at the samples oontaining also the magnetic com- penent of

a

-Fe203 127. On the& samples the non-mag~etio olay component ahaages towards magnetis oomponmt at the tempera- ture

4 0 0 ~ ~ .

Creation of na~netio compo- nents is also dependent on the tias of heating: but under the 5 hours heat* the mount of non-magnetio components only decreas slightly. Therefore we oan conoaud lude that our samples from the inside of the pottery were not fired at the tonape- rature higher than 4 0 0 ~ ~ . These restilts are also in good ae;reemea~t with obtained X-ray data.

Mbssbauer speotrum of samp3es from the surface of the pottery is shown i n figu- re 2. Th3.s spectrum contain magnetic corn- ponent with 16,s) mm s-1 splitting oo-s- pending to 0(

-

Fe203. Tbe midle part is also OI

-

^Fe⁰in supperparamgnetio sta-

2 3

te as a small particles overlapping: with the speotrclm of non-magnet3.0 olay 0-0-

nent which slight amount i n powder oan be present due to sorapips the powder from the stlrfaoe, Speotrrup from the sur- faoe layer is qualltatiwely different from that one obt ained from the inaide the pottery. 'Ibis indicated that the su- rface layer was added on the pottery and has other o r i g i n . These reeulta are also in good agreement with X-ray measurements.

Canclusion

Mbssbauer speotrosoppy results p r w i d e us iPfoxmations about the manufaotuzd.ng of linear ceramio. This kind of pottery w e r r probably not fired Bttt only drped and painted with material prepared sepa- rately. This conoluaion, however, omst

be substantiated by more detailed study of more samples.

References

[I] Bouclaee, R*, Coey, J.M.D., Cousse- ment, R., Sohmidt, K. P., van Rossrrm, H., Aprdhamiarr, J. amd Deshayes, J., J. Physique Colloq. 35 (1974) C 6

-

⁵⁴¹

f

23 Simopulos, A. and Kostikas, A.

,

^Proc,

5th Int. C o n f . Hbssbauer Speetrosco- PY, Bratislava 1973 P O 759