606 MANGANESE DEPOSITS OF INDIA. 
Table showing the composition of certain manganese minerals. 
Name of mineraU 
Formula of mineral 
or compound. 
Per cent, 
of 
Mn. 
Log. of 
per cent, 
of 
Mn. 
Per cent, 
of 
oxygen 
com- 
bined 
with 
Mn. 
Log. of 
per cent. 
cf 
oxygen. 
Per cent, of 
other 
constituents. 
Manganosite] . 
MnO 
77 ' 46 
1 '8891 
22 -54 
1 -3530 
Hausniamiite 
MnsO, . 
72 '05 
1 -8576 
27 -95 
1 -4464 
(Manganese 
sesquioxide). 
MujOj . 
69 '62 
1 -8427 
30 -38 
1 -4826 
Psilomelane ? . 
Mn305 (2MnO.Mn03) 
67-35 
1 -8283 
32-65 
1 -5139 
(Pyrolusite and 
polianite ). 
MnO, . 
63 -22 
1 -8009 
36-78 
1 -5656 
Manganite . J . 
Mn203.H20 
62 50 
1 -7959 
1 -4357 
HjO = 10.23. 
(Manganic manga- 
nate). 
SMnjOj.SJInOj 
61 -60 
1 -7896 
38-40 
1 -5843 
(Manganese trioxide) ' 
MnO, . 
53-40 
1-7275 
46-60 
1 -6684 
Braunite 
SMDjOj.MnSiOs 
63-59 
1 -8034 
26-43 
1 -4221 
Si02;;= 9.98. 
Rhodonite 
MnSiOj 
41-86 
1-6218 
12-18 
1 -0856 
SiOj = 45.96. 
Rhodochrosite 
MnCOj . 
47-83 
1 -6797 
13-91 
1 -1433 
COj = 38.26. 
Spessartite 
3MnO.AlsOj.3SiO J . 
33 24 
1 -5217 
9-67 
0 -9854 
SiO, = 36.50 ; 
AljOj = 20 . 59. 
List showing composition of certain manganese minerals in terms of oxides. 
Hausmannite .... MnO = 31 -00 or 2 MnO = 62-01 
mnf>^) .... MdoOj = 69-00 MnOj = 37-99 
100-00 100-00 
Manganese sesquioxide ...... MnO =: 44-94 
(MnA)] MnOj = 55-06 
100-00 
Psilomelane {">) or . . . 2 MnO = 57-96 or 2 MnO = 28-98 
manganoiis mangnnate . . MnO, = 42-04 MnOj = 71-02 
(MnjMnOj) 
100-00 100-00 
