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ID number:848659
 
Author:
Evaluation:
Published: 26.03.2008.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

Fosfors. Dabā fosfors brīvā veidā nav sastopams, bet ir sastopams fosforskābes sāļu - fosfātu veidā. Brīvā veidā fosforam ir pazīstamas 3 alotropiskās formas.
Fosforu iegūst no dabiskajiem fosfātiem, tos reducējot elektriskā loka krāsnīs ar ogles un kvarca smilšu maisījumu:

Ca3(PO4)2 + 5C + 3SiO2 3CaSiO3 + 2P + 5CO
Svarīgākie fosforu saturošie minerālmēsli:
Superfosfāts – pelēcīgs pulveris vai granulas.
Dubultsuperfosfāts – pelēcīgs pulveris vai granulas.
Precipitāts – balts pulveris.
Fosforītmilti – smalki samalts fosforīts pelēkā krāsā.
Kaulu milti – samalti kaulu pārstrādes atkritumi.…

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