SADI Muslihuddin Abumuhammad Abdulloh ibni Mushrifuddin (1203/8, Sheroz—1292, hamon jo), shoir, nasrnavis va mutafakkiri fors-tojik. …
Mufassal »Pegmatit
Pegmatit (az yun. regmatos —mustahkam vaslshuda), jinsi fishondai beshtar kalondonaest, ki dar bayni jinshoi kuhi dar shakli rag, dayka, linza va digar jismho joygir shudaast. Tuli in jismho ba chandin km va gafsiashon ba chandsad m merasad. Pegmatit dar marhilai okhirini tashakkuli massivhoi intruzivi kristall mebandad. Mineralhoi asosii Pegmatit az …
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