![]() Annual world wide production around 1,000,000 tons per year (B 2O 3). Sources of Boron: Obtained from kernite, a kind of borax (Na 2B 4O 7♱0H 2O).Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances. Vapor Pressure = C Regulatory / Health.Enthalpy of Atomization: 573.2 kJ/mole 25☌.Description: Yellow-brown non-metallic crystal.Conductivity Electrical: 1.0E -12 10 6/cm Ω.Coefficient of lineal thermal expansion/K -1: 5E -6. ![]()
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