1058 
MANGANESE DEPOSITS OF INDIA : DESCRIPTIVE. [ PaRT IV: 
be a new mineral of the formula SMnsOt- 2Fe203; to this I have given 
the name vredenburgite (see page 49). It is distinguished from brannite 
by its duller lustre, bronze tint, and highly magnetic character. The full 
analysis is given on page 44 ; the following shows the constituents of 
commercial importance : — 
Specimen No. A. 346. 
Manganese ........ 45-62 
Iron 21-90 
Silica (total) 0-20 
Phosphorus ........ 0 012 
Moisture 0-20 
There were 185 cart loads of Garividi ore containing about 140 tons 
of ore lying at Garividi station ready for despatch. A sample (A. 28) 
taken from these consisted largely of medium to coarsely facetted 
braunite ; with a certain proportion of the grey psilomelane, with cavities 
filled partly with black powder and partly with braunite, that is so 
characteristic of Kodu -. This sample was analysed by Messrs. J. & H. 
S. Pattinson with the following result : — 
Sample No. A. 28 
Manganese peroxide 
Manganese protoxid 
Ferric oxide . 
Baryta . 
Silica (combined) 
Silica (free) . 
rhosphoric oxide 
Ar.'enic oxide 
Water (combined) 
Moisture at 100°C 
54-62 
16- 02 
14-00 
194 
4-45 
0-25 
0-31 
0-005 
3-80 
0-75 
This indicates the presence of about 45% of braunite and 55% of psilo- 
melane, and is equivalent to : — 
Manganese 
Iron 
Silica (total ) 
Phosphorus 
46-93 
9-80 
4-70 
0134 
