Bulletin of the United States Geological Survey--Corundum and Its Occurrence and Distribution in the United States (A Revised and Enlarged Edition of Bulletin ) . apphire. CORUNDUM. Adamant (Kirwan). Adamantine spar (Kirwan). Adamas siderites (Pliny). Alumina. Anthrax. Armenian stone (King). Corindon (Haiiy). Corindon adamantine (Brongniart). Corindon harmophane (Haiiy). Corivendum. Corivindum (Woodward). Corundite. (orundum (Greville). Demantspath (Klaproth). Diamond spar. Gyrasole (Kirwan). Hard spar. Imperfect corundum (Greville-Bour- non).Karund (Hind).Korund (Werner).Kurund (India).
Bulletin of the United States Geological Survey--Corundum and Its Occurrence and Distribution in the United States (A Revised and Enlarged Edition of Bulletin ) . apphire. CORUNDUM. Adamant (Kirwan). Adamantine spar (Kirwan). Adamas siderites (Pliny). Alumina. Anthrax. Armenian stone (King). Corindon (Haiiy). Corindon adamantine (Brongniart). Corindon harmophane (Haiiy). Corivendum. Corivindum (Woodward). Corundite. (orundum (Greville). Demantspath (Klaproth). Diamond spar. Gyrasole (Kirwan). Hard spar. Imperfect corundum (Greville-Bour- non).Karund (Hind).Korund (Werner).Kurund (India). Rhombohedra 1 corundum (James).Rhombohedrischer corund (Mohs).Soimonite. Spath adamantine (Delameth).Thoneride. Acone ex Armenia (Theophrastus). Armenian stone. Armenian whetstone. Corindon granuleux (Haiiy). Emeri. Emeril (Haiiy). Emerite (Shepard). Emery. Fer oxyde quartzifere (Haiiy). Granular corundum. Grinding spar. Naxium (Pliny). Naxium ex Armenia (Pliny). Pyrites vivus (Pliny). Schmergel. Schmirgel. Smergel (Wallerius). Smirgel. Smiris (Agricola). Smiris ferrea (Wallerius). Smyris (Agricola and Dioscorides). COKUNDUM, ITS OCCURRENCE AND DISTRIBUTION. 15. PHXSIGAI. PROPERTIES OF CORUNDUM. CRYSTAL FORM. Corundum crystallizes in the rhombohedral division of the hex-agonal system. There is considerable variation in the form ofcrystals from different localities, but in theircommon development they usually show theforms of the prism and the pyramid of thesecond order, «(1120) and ?i(2243), in combi-nation Avith the base c(OOOl), and the rhombo-hedron y(lOll). This unit or finidamentalrhombohedron differs but little in angle fromthe cube. There are two common types of is prismatic, in which the prism a{1120) isthe prominent form and is sometimes termi-nated simply by the base 6(0001), fig. 1, andagain by the base and the rhombohedronr(lOll), or by the base, the rhombohedron, andthe pyramid V^( 2243), fig. 2. The other is flatand tabular, in which the basal plane
Size: 1173px × 2129px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidbulletinofun, bookyear1906
