24 MANGANESE DEPOSITS OF INDIA : MINERALOGY. [ PaRT 1 : 
Table 2 — contd. 
List of known manganese minerals with their chief properties. 
Name. 
Formula. 
CrystaUine 
system. 
Specific 
gravity. 
Hardness. 
^ J! e,lrD;U. J( 1j,1Vu1;U2 
TTT rliriwi 
iii.. X ri-rnom- 
bohedral. 
*± 10—0 0 
0 
T 
A A-R 
'± — * \J 
Manganmagne- 
Franklinite . 
(Fe,Mn)O.Fe203 
(Fe,Zn,Mn)0.(Fe,Mn)203 . 
I. . 
I. . 
5-06 
5-07-5-22 
(5-5-6-5) 
5-5-6-5 
Jacobsite 
(]VIn,Mg)0.(Fe.Mn)j03 
I. . 
4-75 
6 
Hausmannite 
IVInO.MiijOs 
II. . 
4-73-4 -86 
5-5-5 
Manganoferrite 
(artificial). 
{Fe,Mn)304 
... 
Crednerite . 
y— 0 i 
4 0 
Vredenburgite 
3Mn304.2Fej03 
4-74-4-84 
6-5 
Sitaparite 
9Mn203.4Fe203,Mn05.3CaO 
•• 
4-93-5 09 
7 
Braunite 
3Mn203.MnSi04 
II. . 
4-75-4-82 
6-6-5 
Polianite 
MnOj 
II. . 
4-83-5-03 
6-6 5 
Pyrolusite 
M11O2 
IV(?). 
4 -73-4 -80 
2-2-5 
MaDganite . 
TV 
i V 
Manganbrucite 
(Mg,Mr)0H20. 
III Rhom- 
bohedral. 
(2-38-2-4) 
(2-5) 
Pyrocbroite . 
MnO.H20 
Ditto , 
3-20 
2-5 
Cbaleophanite 
(Mn,Zn)0,2Mn02.2H20. 
Ditto . 
3 '91-4 -01 
2 5 
Manganates — 
Hollaadite 
m(Ba,MD)2Mn05 +«Fe4(Mu 
05)3- 
VI(?) . 
4-95 
4-6 
Coronadite 
1 
i 
R2Mn05, with R = chiefly 
Mn.Pb. 
Fibrous 
5-246 
4 
