galena
galena Mineral, PbS; sp. gr. 7.4–7.6; hardness 2.5; cubic; lead-grey; lead-grey streak; metallic lustre; crystals cubes or octahedra, and often octahedral twins; cleavage perfect cubic {100}; widely distributed in hydrothermal veins and syngenetic exhalative deposits and as a replacement in limestones and dolomitic rocks, associated in veins with sphalerite, pyrite, chalcopyrite, barite, quartz, fluorite, and calcite.
galena
galena (lead sulphide, PbS) Grey metallic mineral, major ore of lead. It is found in hydrothermal veins and as a replacement in limestone and dolomite rocks. Hardness 2.5–2.7; r.d. 7.5.
More From encyclopedia.com
Lead , Lead
Lead is in column IVA of the periodic table . It has four naturally occurring stable isotopes, lead-204, lead-206, lead-207, and lead-208. The l… Stibnite , stibnite (antimonite, antimony glance) One of the main ore minerals for antimony, with the formula Sb2S3; sp. gr. 4.6; hardness 2.0–2.5; orthorhombic… Molybdenite , molybdenite Mineral, MoS2; sp. gr. 4.6–4.8; hardness 1.0–1.5; hexagonal; pale bluish to lead-grey; greenish-grey streak; metallic lustre; crystals he… Lead Poisoning , Lead is an indestructible heavy metal that can accumulate and linger in the body. Although the problem of lead exposure has been reduced in the Unite… Periodic Table of the Elements Lead , lead (symbol Pb) Metallic element of group IV of the periodic table, known from ancient times. Its chief ore is galena (lead sulphide), from which le… leadwort , plumbago †yellow and red oxides of lead XVII; black lead, graphite XVIII: genus of plants, leadwort XVIII. — L. plumbāgō (i) lead ore, (ii) leadwort,…
About this article
galena
All Sources -
You Might Also Like
NEARBY TERMS
galena