28 MANGANESE DEPOSITS OF INDIA : MINERALOGY. [ PaRT I : 
Table 2 — corad. 
List of known manganese minerals with their chief properties. 
Name. 
Formula. 
Crystalline 
system. 
j Specific 
gravity. 
Sardn6sS« 
Tin o.^ IIVTnrkQ^I^- 
ijuotc wrifiAJtfti/i 
cates — 
Witbamite 
Epidote with small (jAian- 
tity of Mn. 
V. . 
3'14 
6-6-3 
Piedmontite . 
Ca2 (AlOH) {Al,Mn,Fe)2 
1 V. . 
i 3-40 
6-0 
Hancockite 
Vx^D,ca,br,Mn)2 L(-^>-'' c,Mnj. 
OH](Al,Fe,Mn)2(Si04)3 
1 V. . 
Axinite 
-Doro-oiiicate oi iiJ, j?e, ua, 
Mn. 
i VT 
' V X. 
D 0—/ 
Acid OrllMsilicate- 
Harstigite . 
JI7 lCa,Mnjl2Al3 blio U40. 
IV. . 
00 
Svb8Uicaie.s — 
Leticophoenicite 
(manganese- 
H2(Pb,Mn,Ca, Zn)7Si30]4. 
V.(?) 
3-85 
Hvaite 
HCa re"2 Fe "'Si2 O9 with 
often ]Mn 
IV. . 
3 -99-405 
5-6-6 
ArdGimitc 
±l5l)in4ai4 V 014^23 
TV 
0 Oi—O DiS 
0—7 
Langbanite 
mSb203.wFe203.pMn"(Mn''', 
Si)03. 
III. Rhom- 
bohedral. 
4-65-4 -92 
6 
Kentrolite 
2PbO.Mn203.2Si02 ; 
IV. . 
6-19 
5 
Carpholite 
H4]VInAl2Si20i6 • . ' 
V. . 
2-93 
5-5-5 
Hydroua SUieales- 
Inesite . 
2(Mn.Ca)Si02 + H2O. 
VI. . 
3-03 
6 
€ranophyllite . 
6H20.71VInO.Al203.8Si02. 
V. . 
2-84 
4-4-5 
Agnolite 
H2Mn8{Si03)4+H20. 
VI. . 
3-05-3-07 1 
5 
