[Nix; REN AND 
ULLKBKAND. 
MINERALS FROM CLIFTON-MORENCI, ARIZONA. 53 
rom one of the great copper camps of the Territory. Somewhat later 
b was identilied by Prof. H. A. Miers on two specimens from Corn- 
rail, England, but the American locality has not yet been found. It 
3, therefore, a matter of interest to record its discovery on some speci- 
nens from the Metcalf mine of the Arizona Copper Company, taken 
rom the workings in the great open cut not more than 100 feet below 
he surface. These specimens consist of white sericitized granite- 
>orphyr\\ in part silicified, and traversed by veinlets and irregular 
lasses of cuprite; the cuprite contains native copper and is covered 
»y crusts of malachite, brochantite, and chrysocolla. A soft and scaly 
•luish-green coating on the chiysocolla proved to consist of microscopi- 
al hexagonal crystals or cleavage foils, remaining dark between crossed 
licols. The mineral was identified as spangolite, a determination in 
idiich Professor Penfield concurred. No measurable crystals were 
ound. and the mineral is very inconspicuous. It is difficult, if not 
npossible, to obtain material entirely free from other minerals. 
Selected bluish flakes from this specimen gave tests for water, and 
ie sulphate and chlorine ions, besides copper. There was too little 
f this pure material to permit of a test for alumina, but the mixed 
apper minerals composing the greater part of the specimen showed 
le presence of this body. It seems therefore probable on these 
rounds alone that the bluish flakes are spangolite. Vanadium, phos- 
horus, and arsenic are absent. 
The closed-tube reactions of the mixed copper minerals are very 
riking. Water is given off first. Then appears suddenly a white 
lblimate (A1C1 3 ?) near the assay, which seems to form or at once 
lange to minute colorless drops. This deposit can be driven slowly 
3 the tube, followed at its lower, sharply denned edge by darkyellow- 
•own drops (CuCl 2 ?), which on cooling solidify to greenish crystal- 
le aggregates, and the part of the tube between them and the assay 
ows under the lense delicate feathery crystallizations like frost mark- 
gs on window panes. Down in the flame the glass becomes colored 
d (Cu 2 0?) and in parts yellow. On charcoal the blowpipe flame is 
lored azure blue and at the same time green. 
In order to compare the above closed-tube behavior with that of 
doubted spangolite, a small fragment of the latter, offered by Pro- 
issor Penfield, was tested. It gave water and then a white sublimate 
ile the one above mentioned, followed by a dark olive-brown liquid, 
■rich on cooling passed through lighter shades of color and solidified 
a a bright screen ring. In general this behavior is very like that of 
t'e mixture under examination from Clifton. 
GTCRIIARDTITE. 
;The cliffs of granite-porphyry in the deeply eroded Chase Creek 
Cnyon at Metcalf in many places show a conspicuous and extensive 
bight green coating of some copper mineral, which, no doubt, is 
