284 



PHOSPHORBLEL 



"2H = oxide of copper 68"0, phosphoric acid 

 20-3, water 7-07 = 100. 

 According to Hermann, Phosphochalcite 



is a compound of Dihydrite (Cu^ P + 2H), 



and Ehlite (Cu^ P + 3H) ; Kordenskiold, on 

 the contrary, concludes that Ehlite and 

 Phosphochalcite are identical, and repre- 

 sented by the formula Cu^ P + 2H. 



Analysis, from Rheinbreitenbach, by Her- 

 mann. S.G. 4-4 : 



Oxide of copper . . . 67-25 

 Phosphoric acid . o . 24-55 

 Water . „ . . . 8-20 



100-00 



BB alone when suddenly heated falls to 

 powder; heated slowly on charcoal, turns 

 black and fuses to a black globule, contain- 

 ing a small granule of copper. 



Easily soluble in nitric acid and ammonia. 



Localities. Rheinbreitenbach, Virneberg, 

 and Linz, on the Rhine. Nischne Taguilsk, 

 in the Ural. Hungary. 



The Phosphochalcite from Taguilsk and 

 Hungary contains a small quantity of arsenic, 

 and iSergemann has found arsenic in all 

 the native phosphates of copper. 



For varieties, see Dihydrite, Ehlite, 



COPPER-DIASPORE, TaGILITE, PrASIN. 



Phosphorblei. See Pyromorphite. 

 Phosphoreisensinter, Rammelsherg. See 

 Diadochite. 



Phosphorite, Wei'ner. See Apatite. 

 Phosphorsaure Yttererde. See Xe- 



NOTIME. 



Phosphy'ttria, Berzelius. See Xeno- 



TIIME. 



Photicitb, or Photizite, Dumenil. A 

 mixture of Rhodonite (silicate of man- 

 ganese) and carbonate of manganese, from 

 the neighbourhood of Riibeland, in the 

 Harz. It has frequently a fibrous texture, 

 and presents various tints of red, green, and 

 grey, which become darker on exposure to 

 the"^air. 



Analysis, by Dumenil : 

 Silica . 



Oxide of manganese 

 Carbonic acid 

 Alumina 

 Oxide of iron 

 Water . 



Photolith, Breithaupt. 



. 39-00 

 . 49-87 

 . 4-00 

 . 0-12 

 . 0-25 

 . 6-00 



99-24 

 See Pectolite. 



PICKERINGITE. 



Phyllite, Thomson. A variety of Ottre- 

 lite, met with in oblong or nearly elliptical 

 scales, disseminated in argillaceous schist 

 over a large area about Sterling, Gorham, 

 and other places in the United States. 

 Analysis, from Leeds, by T. Sterry Hunt : 



Silica 26-30 



Alumina .... 37-10 

 Protoxide of iron . .25-92 



Protoxide of manganese . 0-93 

 Magnesia .... 3-66' 

 Water ..... 6-10 



100-01 



Name. From (puXXw, a leaf. 



Phylloretin, Forchammer. A mineral 

 resin, found in the pine stems in the marshes of 

 Hottegard, in Denmark. It dissolves readily 

 in alcohol, and melts at 87° C. (124-6° F.). 



Comp. C3H2 = carbon 88-88, hydrogen 

 9-22 = 100. 



Physalite, Hisinger. A coarse, almost 

 opaque, variety of Topaz, found in yellowish- 

 white crystals, occasionally of considerable 

 dimensions, in Sweden, at Broddbo, and in 

 a granite quarry at Finbo, near Fahlun. 

 This variety intumesces when heated, whence 

 the names Physalite, from <?vcra.M, to blow, and 

 Pyrophysalite from ^v^, fire, and ,fv(ra.ai. 



PiAuziTE, Haidinger. ' An earthy Mine- 

 ral Resin of a brownish-black colour, much 

 resembling slaty and lamellar black Coal. 

 Texture never crystalline. Lustre resinous. 

 Feebly translucent at the thinnest edges. 

 Streak yellowish- brown. Sectile. Fracture 

 imperfect-conchoidal. Fuses to a black mass 

 like pitch at 600° F., and burns with a 

 lively yellow flame, giving out an aromatic 

 odour and a dense smoke. Soluble in 

 ether, alcohol, and caustic potash. H, 1-5, 

 S-G. 1-22. 



Localities. Piauze, near Neustadt, in Car- 

 niola; the lignite mine of Mount Chum, 

 near Markt Tiiffer, in Styria. It is met 

 with in small lumps, and very thin layers, 

 in nearly all the mines in which the carbo- 

 niferous strata are worked from Tiiffer to 

 Trifail and Sagor. 



PiCKERmGiTE, Hayes. A variety of Mag- 

 nesia Alum, occurring in masses, compose!^ 

 of long parallel fibres, generally afford- 

 ing rhombic forms. Colour white; pale rose- 

 red or delicate green in the direction of the 

 fibres. Lustre like that of the finest Satin- 

 spar, which it much resembles. Trans- 

 parent to translucent. Tastes like alum. 

 S.G. 1-78 to 1-8. 



Comp. MgS-+-ArS3 + 22H. 



