32 MANGANESE DEPOSITS OF INDIA T MINERALOGY. [ PaRT I : 
Table 2 — contd, 
Inst of known manganese minerals with their chief 'properties. 
Name. 
i 
Formula 
■ Crystalline 
i system 
Specific 
gravity. 
1 Hardness. 
Hydrou PJios- 
phaies and 
Arsenates, etc. — 
1 
— 
Purpwrite 
(Mn'", re"')2P208 + H2O . 
IV.? 
3- 15 
4-4-5 
Dicknsonite 
1 3R„P„Oi! + H„0 witli 
R=t Mii,Fe,Xa3, also Ca, 
V, 
3*34 
3o-4 
Fillowite 
3R3P20-5+ H2O with 
R^Afn Fp Pa and \a . 
V. 
3-43 
4-5 
Brandtite 
Ca2MnAs208 + 2H20. 
VI. 
3-67 
5-5-5 
Fairfieldite 
Ca2MnP208 + 2H2O. 
VI. 
3- 07-3- 15 
3-5 
Reddingite 
Mn3P208 + 3H2O 
IV. 
3- 10 
3-3-5 
Jd.ur6aiilit€ • 
HoMmfPO^ili 1- 4HoO 
Y_ 
5 
Hemafibrite . 
Ulna As208.3Mn(OH)y + 2H2 
0. 
IV. 
3- 50-3- 65 
3 
Childremte 
(Fe,Mn)Al{OH)2P04 + 2H2O. 
IV. 
3- 18-3 24 
4-5-5 
Eosphorite 
{Mn,Fe)Al(OH)2P04 + 2H2O. 
IV. 
3- 11-3- 15 
5 
Atopite 
Ca2Sb207 with often Mn. 
I. 
5-03 
5-5-6 
Borates — 
Sussexite 
H(Mn,Mg,Zn)B03 
IV? 
3-42 
3 
Pinakiolite 
3MgO.B203 + Mn0.iln20«. 
IV. 
3-88 
G 
