402 C. U. Shepard—Mineralogical Notices. 
oe eG: ea BEL yas Sie 47100 
MAG. SU oo a a TO 
Water SUSE Oo Ue cee eeu 5928 
90°098 
And raising the above figures to 100, we have as the com- 
position of the monetite, 
heiress WI ie ee 52°28 
je ees Aaa ra Pete Oe ee ee 41°14 
Waker POU Gs. PON ae IES Ur, 6°58 
100°00 
Dividing the above percentages by the respective molecular 
weights, we have: 
phen ae acid_... 52°28 +142 = 0°368 
bi oe ee 41°14 56 = 0°735 
Witer ieee 6°58 — 18 = 0°366 
or very nearly, as 1 phosphoric acid: 2 lime: 1 water. This 
would require the formula zCaO, H,O, P,O, (or CaHPO,), as a 
comparison of the calculated and ‘obtained results will show. | 
Calculated. Found. 
per ore BOUL Ss ous cas 52°20 52°28 
Se 41°18 41°14 
Wikia: SS a eg ehia Sie 6°62 6°58 
100°00 100°00 
Monetite is a crystalline dicalcie-hydric-phosphate, or dicalcic- 
ortho-phosphate, differing from that artificially prepared (by the 
action of calcic chloride on disodic-hydric-phosphate), in not 
possessing water of crystallization as does the latter—(PO,H), 
Ca,+2H,0. 
2. Monite. —Intimately associated with the monetite, above 
described, is a hydrated tricalcic phosphate, resembling in color 
and density the more friable varieties of kaolinite, and whic 
we propose to designate monite, after one . the islands where 
itis found. It has the following characte 
Massive, slightly oe impalpable a wholly uncrystal- 
line; snow-w fractur ot elt dull; hardness, below 
gravity 2-1 faciotoxienststys B:B. melts with difficulty to an 
opaque, white enamel of feeble luster. In closed tube emits 
much moisture. 
