Chap. II. ] ust op manganese minerals^ 25 
Table 2 — contd. 
List of known manganese minerals with their chief properties. 
Name. 
Formula. 
Crystalline 
system. 
Specific 
CTavitv 
oi » ivy , 
Hardnesi. 
Psilomelaue . 
HiJInOo, with H replaced 
by Fe, Mn, Ni, Co, Mn, 
xSa, Ca, Jv, etc. 
Amorphous 
3 1-4 1 

5-6 
Beldongrite . 
6Mn3O5.Fe2O3.8H2O 
Ditto . 
3 -22 
4 
Wad . 
Impure Mn oxides passing 
into psilomelane. 
Ditto . 
3 0-4 3 
l-« 
Carbonates — 
Mangancalcite 
{Ca,Mn)C03 . 
m. Rhom- 
bohedral. 
2 78-2 -84 
(3) 
Mangandolo - 
mite. 
(Ca,Mg,Mn)C03 
Ditto . 
2 -83-2 '89 
(3-5-4) 
Aukerite 
CiaOU3.(iu.g,x e,Mn)(>Us 
Ditto . 
2 '95-3 '1 
3 "5-4 
Mangansiderite 
(oligonite). 
(Fe,Mn)C03 . 
Ditto . 
3 -71-3 -74 
(3 0-4) 
Rhodochrosite 
MnCOs .... 
Ditto . 
3 -45-3 6 
3 0-4 -6 
Metasilicates-— 
Violan . 
Anthochroite J 
Manganiferous diopside . | 
V. . 
V. . 
3 -21-3 -27 
5-0 
Blanfordite . 
Probably allied to violan • 
V. . 
3 "15 
Manganheden- 
bergite. 
Asteroite 
Ca(Fe,Mn)(Si03)2 . 
Var. of manganhedenbergite 
V. . 
V. . 
3 55 
(5-6) 
Schefferite . j 
(Ca,Mg)(Fe,Mn)(Si03)2 . 
V. . 
JeSersonite . j 
(Ca,Mg)(Fe,Mn,Zn)(Si03)2 
V, . 
3 -36 
