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Element

Photoelectric Work Function

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Aluminum

4.08 eV 

Antimony

4.01 eV 

Arsenic

5.11 eV 

Barium

2.48 eV 

Beryllium

3.92 eV 

Bismuth

4.25 eV 

Boron

4.5 eV  

Cadmium

4.0 eV  

Calcium

2.706 eV

Carbon

4.81 eV 

Cerium

2.84 eV 

Cesium

1.92 eV 

Chromium

4.37 eV 

Cobalt

4.20 eV 

Copper

4.18 eV 

Germanium

4.5 eV  

Gold

4.82 eV 

Iodine

6.8 eV  

Iron

4.33 eV 

Lead

4.05 eV 

Lithium

2.35 eV 

Magnesium

3.68 eV 

Manganese

3.76 eV 

Mercury

4.53 eV 

Molybdenum

4.25 eV 

Nickel

5.01 eV 

Niobium

4.5 eV  

Palladium

4.97 eV 

Platinum

5.22 eV 

Potassium

2.24 eV 

Rhenium

5.0 eV  

Rhodium

4.57 eV 

Rubidium

2.09 eV 

Selenium

4.8 eV  

Silicon

4.52 eV 

Silver

4.73 eV 

Sodium

2.28 eV 

Strontium

2.74 eV 

Tantalum

4.14 eV 

Tellurium

4.76 eV 

Thallium

3.68 eV 

Thorium

3.47 eV 

Tin

4.38 eV 

Titanium

4.06 eV 

Tungsten

4.49 eV 

Uranium

3.63 eV 

Vanadium

3.77 eV 

Zinc

3.73 eV 

Zirconium

3.82 eV 

Reference    (Click the button next to a value above to see complete citation information for that entry)

Mechtly, Eugene A. "Properties of Materials." pp. 4–1 to 4–33 in Reference Data For Engineers: Radio, Electronics, Computer, and Communications. By Mac E. Van Valkenburg, edited by Wendy M. Middleton. Woburn, MA: Butterworth-Heinemann, 2002. doi:10.1016/B978-075067291-7/50006-6