26 MANGANESE DEPOSITS OF INDIA : MINERALOGY. [ ParT 1 : 
Table 2 — coixld. 
List of known manganese minerals with then chief properties. 
Name, 
Formula. 
Crystalline 
system. 
Specitic 
gravity. 
Hardness. 
TTrliJiTi i ff* 
(Ca, Mg,Mn) SO + 2Na Fe'" 
(Si03)2. 

V. 
5-C 
Manganptcto- 
lite. 
H20.Na20.4(Ca,Mn)0.6Si02 
V. 
2 '84 
5 
T 1 '(■f* 
a> V CUl l-v ■ 
[(Si,Zr)03j2. 
V. 
Q 
xviiuuuiiii'c; • 
VI. 
•i -A Tie 
0 '5-6 '5 
Bustamite 
(Mn,Ca)Si03 
•• 
Fowlerite 
(Mn,Zn,Fe,Ca)Si03 
VI. . 
3-67 
Babingtonite . 
(Ca, Fe,Mn)Si03 and Fe2{Si 
03)3- 
VI. 
3 -35-3 37 
5-5-0 
J 1- A d 'J i-1 1 K • 
Tremolite containing a little 
Mn. 
V. . 
3-0 
.„ 
VV lUCll'vC • 
Na, K, and Jin. 
V. . 
2 -98-3 "08 
_^ 
Dartneinorite . 
V. silfbergite. 
(Fe,Mn,Mg)Si03 . . 
V. . 
3-45 
5-5 
Richterite 
[(K,Na)2,Mg,Ca,Mn]Si03 • 
V. . 
3 09 
... 
Astochite 
(Mg,Mn,Ca)Si03 and (Xa,K, 
H)2Si03. 
V. . 
3 -05-3 '10 
Gamsigradite 
Manganese-hornblende 
V. . 
Barkevikite 
Mn-amphibole near glau- 
cophane. 
V. 
Infermediate 
Silicates — 
Barysilite 
Pb3Si207 with Mn, Ca, an J 
' Mg. 
in. . 
6 -11-6 -55 
3 
Ganomalite . 
Pb3Si207.(Ca,Mn)2Si04 . , 
11. . 
4 -98-5 -74 
3 
