Annex I Units of Measure: Code elements listed by quantities - UNECE

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Codes for Units of Measure used in International Trade Units of Measure: Code elements listed by quantities Quantity Level Cat. Use Id. Name Conversion factors to SI units (1 unit equals) Represen. Symbol Cross ref. angular repetency, angular wave number Fermi angular repetency, Fermi angular wavenumber Debye angular repetency, Debye angular wave number angular reciprocal lattice vector fundamental reciprocal lattice vector Debye angular frequency 1 reciprocal metre m -¹ 899 1 reciprocal ångström 10 10 m - ¹ (exactly) Å -¹ 900 1 radian per metre rad/m 901 1 reciprocal metre m -1 902 1 radian per second rad/s 903 1 reciprocal second s -1 904 Debye temperature 1 kelvin K 905 Curie temperature Néel temperature Fermi temperature Super conductor transition temperature spectral concentration of vibrational modes (in terms of angular frequency) 1 second per cubic metre s/m ³ 910 1 second per radian cubic metre s/(rad . m 3 ) 911 Grüneisen parameter 1 one 1 912 Madelung constant 1 one 1 913 Landau-Ginzburg number 1 one 1 914 density of states 1 reciprocal joule per cubic metre 1 reciprocal electron volt per cubic metre J -¹ /m ³ 915 6,241 46 x 10 18 J - ¹/m³ eV -¹ /m ³ 916 residual resistivity 1 ohm metre Ω . m 917 Lorenz coefficient 1 volt squared per kelvin squared V ² /K ² 918 Hall coefficient 1 cubic metre per coulomb m ³ /C 919 thermoelectromotive force between substances a and b Peltier coefficient for substances a and b thermodynamic critical magnetic flux density 1 volt V 920 1 tesla T 922 176 Recommendation 20
Codes for Units of Measure used in International Trade Units of Measure: Code elements listed by quantities Quantity Level Use Name Conversion factors to SI Represen. Cross Cat. Id. units (1 unit equals) Symbol ref. lower critical magnetic flux density upper critical magnetic flux density Seebeck coefficient for substances a and b 1 volt per kelvin V/K 925 Thompson coefficient 1S millivolt per kelvin mV/K 926 work function 1 joule J 928 Fermi energy 1 electronvolt 1,602 177 33 x 10 - 19 J eV 929 gap energy 1S femtojoule fJ 930 donor ionization energy 1S attojoule aJ 931 acceptor ionization energy exchange intergral superconductor energy gap electron affinity Richardson constant 1 ampere per square metre kelvin squared electron number density, volumic electron number hole number density, volumic hole number donor number density, volumic donor number intrinsic number density, volumic intrinsis number acceptor number density, volumic acceptor number A/(m ². K ² ) 936 1 reciprocal cubic metre m -³ 937 effective mass 1 kilogram kg 942 mobility ratio 1 one 1 943 Miscellaneous (to be found a suitable quantity) Burst index 1M kilopascal square metres per gram kPa . m²/g 944 Hardness index 1M kilopascals per millimetre kPa/mm 945 Porosity 1M millilitres per square centimetre second Porosity 1M cubic feet per minute per square foot Sheet density 1M ounces per square foot per 0,01 inch ml/(cm² . s) 946 ft³/(min/ft²) 947 oz/(ft²/cin) 948 Recommendation 20 177
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Annex I Units of Measure: Code elements listed by quantities - UNECE

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