er 
aa oe 
e a% 
68 ‘dans.crmaneniiens 
(6. ) a icaceous minerals.—(a.) Crystalline. 
1. Fahlunite. (Trolle ‘Wachtmeister. ie 
889% 7°30 ‘ 
~ 99.90 : ave: 7:30 : (R)° Si+2 agi, 
From the mean of two analyses. 
2. Esmarkite. (A. Erdmann.) 
23:88: 14-98 : 7:40 ‘ie oe. 
2 00 : 15:33 : 7°66 . en 
The analysis gave a loss of 1:45. According to the above, 
9 fahinnite and esmarkite have the formula of epidote, as has 
likewise Meionite. In esmarkite (R)=8-99 Mg, 4:10 Na, 1:43 Fe, 
0-63 Mn, 0-68°K, 3.20%, in fahlunite 6-04 to 6:75 Me, 0:0 to 
7°22 Fe, 1°72 to 224 Mn, ‘00 to 4:45 Na, 0-94 to 1:98 K, trac ce 
to 1°35 Ca, 8-65 to 11-66 H, * 
3. Pyrargillite. ( Nordensjol ) 
22°82 : 13°51 : 7-56 
22-00 : 1466 : 7:33 (Ry? Si42 A Si, 
formula of the two foregoing minerals, and likewise of the 
others cited above. (R)=5-30 Fe, 2:90 Mg and Mn, 1:05 K, : 
1:85 Na, 15-47. Pyrargillite, as also fallunite, appears to het 
a rhombic crystalline form. That of esmarkite is not known. 
A. Praseolite. (A. Erdmann.) 
21:27 : 13°47 : 9°16 oes 
22:00 : 13-90 : 880 ; *e(R) S143 Al Si. 
5. Zeusite. (Thomson. ) 
17-37 : 14-87 : 8-16 <e e 
17°50 : 15-00 # tent 3(R)* Sit+2 Als Si’. 
7 6. Roselane. (Svanberg.) 
Ptah tOol Bee eee ee 
, 93-33 : 15-55 : 5-18 : (Ry? Si+2 0 Bi. 
; E ) 
(R) =6-63 K, 3-59 Ca, 2-45 Mg, 6-53. The ielrom ratio 
of polyargite (Svanberg) resembles that of roselane say shourine 
viz., 22°98": 
R) =6:73 K, 5-55Ca, 1-43 Mga trace, Mn, 5:29 Hf, Both 
minerals, moreover, have a similar clear age mips specific. BAN, 
ity and a similar color. Gi 
7. Kirwanite. (Thomson. ) = so ” 
21:04 : 5:32: 12:28 a 
21-0060: 12005 O(R)* Si+ANSi 
x 
