Assertion: impurity's density | /r/HasProperty | 1022 cm-3
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Source sentences:
text: For example, in Ge and Si doped with impurities of group III or group V elements, this condition is satisfied even at N im ~ 1018-1019 cm-3, whereas these impurities can be introduced in concentrations up to N im ~ 1021 cm-3 when the atomic density of the host material is — 5 × 1022 cm-3.