972 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [pART IV ; 
This is equivalent to : — 
Manganese 
Iron 
Silica 
Pliosphonis 
Moist lire 
55-08 
4-28 
4-58 
0-17 
0-3() 
The analysis can be expressed in terms of its inineralogical composition 
as follows : — 
Apatite 
Braunite . 
Hollandite or Psilomelane : 
0-88 
31 -08 
Fe4(Mn05)3 . 
. 12(U 
Al4(Mn05)3 . 
. 1-81 
Ba2Mn05 
. 4-89 
CagMnOs 
. 3 17 
H4Mn06 
. 0-15 
Mn2MnU5 
. 43-96 
05-99 
Quartz 
Moisture at 100°C. 
AP2O5 
Subtract oxygen assumed 
. 05-99 
1-42 
. 0-30 
. 0 -009 
100-339 
. 0-52 
99-819 
The manganate is probably present as the crystalline form, hollandite, 
and not as the amorphous form, psilomelane. 
The above analysis of a single specimen can be compared with that 
of a mixture of 14 samples of manganese-ore taken by Mr. Goodchild 
all along this belt in Mandvi Bir, Junawani, and -Junapani. The analysis 
was carried out by James E. Ferguson of London, and is as follows : — 
Dried at 212'F. Per cent. 
ilanganese peroxide .... 
03-25 
Mn 
49-59 
Manganese jjrotoxide .... 
12-42 ) 
Ferric oxide ..... 
4-28 
Fe 
2-99 
Alumina ...... 
1-65 
Baryta ...... 
4-59 
Lime ...... 
0-31 
Magnesia ...... 
0-19 
Silica ...... 
6-25 
Phosphoric oxide .... 
0-153 
P 
0-067 
Arsenic oxide ..... 
0-009 
As 
0-006 
Sulphur trioxide .... 
0-085 
S 
0-034 
Carbon dioxide ..... 
0-240 
Copper oxide ..... 
0-086 
Cu 
0-069 
Lead oxide ..... 
0-013 
Pb 
0-012 
Zino oxide ..... 
0-070 
Zn 
0-056 
Nickel and cobalt oxides 
0-030 
Ni and Co 
0-023 
Combined water 
2-90 
Alkalies and undetermined, by difference 
3-474 
100-000 
