450 BC - 400 BC

Abdera   Thracia
Αβδηρα   Θράκη

 Hemidrachm / Ημίδραχμον AR 12
 SHH 762

Material Composision Analysis
Definitions
0762 Abdera Analysis Defmínitions


Surface material layers are removed gradually with a rotating polisching brush.
Layer thickness is assessed from weight, mean diameter and an approximate density,
as shown in the definitions above.
0762 Abdera composition Study Initial
0762 Initial; zobv = 1.319 mm; zre = 0.000 mm
 0762 Abdera Composition Study Polished rev 1
0762 Polished rev 1; z = 0.057 mm
0762 Abdera Composition Study Polished rev 2
0762 Polished rev 2; z = 0.071 mm		 0762 Abdera Composition Study Polished rev 3
0762 Polished rev 3; z = 0.128 mm
 0762 Abdera Composition Study Polished rev 4
0762 Polished rev 4; z = 0.153 mm


 Measurement coordinates  r and φ are  referred to the die orientation of the obverse
Electrical Conductivity σ, SigmaTest, 8 mm sensor, 22.8./24.10.2021

Comment
 κΗz
60
 120
 240
 480
 960





z
 σ
 z
 σ
 z
 σ
 z
 σ
 z
 σ
r
 φ



mm
 MS/m
 mm
 MS/m mm
 MS/m mm
 MS/m mm
 MS/m
mm
 °
















 Initial obv
0.679
 10.3 0.850
   9.6
 0.967
   8.5
 1.128
   6.9
 1.092
   5.2
0
 0
 Polished rev 1
 obv
0.682
 10.4
 0.848
   9.5
 0.969
   8.6
 1.125
   7.0
 1.092
   5,1
0
 0
 Polished rev 2
 obv
0.691
 10.7
 0.858
   9.9
 0.973
   8.8
 1.129
   7.3
 1.098
   5.4
0
 0
 Polished rev 3
 obv
0.685
 10.5
 0.858
   9.9
 0.973
   8.8
 1.129
   7.3
 1.098
   5.4
0
 0
 Polished rev 4
 obv
0.685
 10.5
 0.858
   9.9
 0.971
   8.7
 1.126
   7.1
 1.094
   5.2
0
 0
 Initial
 rev
0.611
 11.0
 0.444
 10.4
 0.330
   9.5
 0.257
   7.9
 0.213
   5.8
0
 0
 Polished rev 1 rev
0.603
 11.6
 0.438
 11.0
 0.321
 10.2
 0.248
   8.6
 0.203
   6.4
0
 0
 Polished rev 2
 rev
0.603
 11.6
 0.432
 11.3
 0.310
 11.0
 0.224
 10.5
 0.167
   9.4
0
 0
 Polished rev 3
 rev
0.590
 12.1
 0.419
 12.0
 0.296
 12.0
 0.209
 12.1
 0.148
 12.1
0
 0
 Polished rev 4
 rev
0.583
 12.4
 0.404
 12.9
 0.289
 12.6
 0.206
 12.4
 0.146
 12.4
0
 0

Composition Niton XL2 air plus, 8 mm Colimator, 23.10./24.10.2021
Comments

Cu
 Sn
 Pb
 Zn
 As
 Au
 Ag
 Fe
 Ni
 Cr
 Al
 Si
 P
z
 r
 φ



%
 %
 %
 %
 %
 %
 %
 %
 %
 %
 %
 %
 %
mm
 mm
 °




















 Initial
 obv
0.4
 0.0
 1.4
 0.1
 0.0
 0.4
 93.4
 0.4
 0.0
 0.0
 2.3
 1.5
 0.2
1.319
 0
 0
 Polished rev 1
 obv
0.4
 0.0
 1.6
 0.3
 0.0
 0.4
 93.5
 0.4
 0.0
 0.0
 2.0
 1.4
 0.1
1.319 0
 0
 Polished rev 2
 obv
0.5
 0.0
 1.5
 0.2
 0.0
 0.4
 94.2
 0.4
 0.0
 0.0
 1.7
 1.1
 0.1
1.319 0
 0
 Polished rev 3 obv
0.6
 0.3
 1.5
 0.2
 0.0
 0.5
 94.4
 0.3
 0.0
 0.0
 1.3
 0.9
 0.2
1.319 0
 0
 Polished rev 4
 obv
0.5
 0.0
 1.4
 0.2
 0.0
 0.5
 94.6
 0.2
 0.0
 0.0
 1.7
 0. 8.2
1.319 0
 0
 Initial
 rev
0.4
 0.3
 1.4
 0.1
 0.0
 0.4
 93.3
 0.4
 0.0
 0.0
 2.2
 1.5
 0.1
0
 0
 0
 Polished rev 1
 rev
0.6
 0.0
 1.2
 0.1
 0.0
 0.5 95.9
 0.1
 0.0
 0.0
 0.9
 0.5
 0.2
0.057
 0
 0
 Polished rev 2
 rev
3.4
 0.0
 1.6
 0.1
 0.0
 0.5 93.0
 0.1
 0.0
 0.0
 0.5
 0.7
 0.2
0.071
 0
 0
 Polished rev 3
 rev
4.8
 0.0
 2.1
 0.0
 0.0
 0.4 92.0
 0.1
 0.0
 0.0
 0.0
 0.5
 0.1
0.128
 0
 0
 Polished rev 4
 rev
5.4
 0.0
 2.4
 0.0
 0.0
 0.3 91.5
 0.0
 0.0
 0.0
 0.3
 0.1
 0.1
0.153
 0
 0

   
Graphic  presentaion of measurement results
XRF-Data for Al, Si and P have been included, because they have an effect on electrical conductivity.
XRF Ag(z) +/- Al, Si, P
Fig.1   XRF Ag (z)
with and without light metals
 XRF Cu & Pb
Fig. 2   XRF Cu(z) & Pb (z)

 XRF Al & Si
Fig. 3   XRF Al(z) & Si (z)
XRF Cu+Pb = f(Al+Si)
Fig. 4   XRF Cu+Pb = f(Al+Si)

 σ(z, Removed Surface Layers)
Fig. 5   σ (z, f)
Varying surface layer removal
 XRF & σ Cu & Cu+Pb = f(σ 960 kHz
Fig. 6   XRF Cu & Cu+Pb =
= f(σ, 960 kHz)