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Neltnerite

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Manganese Mine, Copper Harbor, Keweenaw Co., Michigan, USA
© Brent Thorne 2011




Formula:
CaMn
3+
6
(SiO
 
4
)O
 
8
System:TetragonalColour:black
Hardness:6
Member of:Braunite Group
Name:Named in honour of Louis Neltner, pioneer student of mineral deposits of the High Atlas Mountains, Morocco.
This page provides mineralogical data about Neltnerite.

Classification of Neltnerite

IMA status:Approved 1979
Strunz 8th edition ID:8/B.09-07
Nickel-Strunz 10th (pending) edition ID:9.AG.05

9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
Dana 8th edition ID:7.5.1.2

7 : MULTIPLE OXIDES
5 : (AB)2X3
Hey's CIM Ref.:14.18.19

14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe
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Type Occurrence of Neltnerite

Type Locality:Tachgagalt Mine, Ouarzazate Province, Souss-Massa-Draâ Region, Morocco
Year of Discovery:1979

Physical Properties of Neltnerite

Lustre:Sub-Metallic
Colour:black
Streak:black
Hardness (Mohs):6
Cleavage:Poor/Indistinct

Crystallography of Neltnerite

Crystal System:Tetragonal
Cell Parameters:a = 9.46Å, c = 18.85Å
Ratio:a:c = 1 : 1.993
Unit Cell Volume:V 1,686.92 ų (Calculated from Unit Cell)

Chemical Properties of Neltnerite

Formula:
CaMn
3+
6
(SiO
 
4
)O
 
8
Essential elements:Ca, Mn, O, Si
All elements listed in formula:Ca, Mn, O, Si
Common Impurities:Fe

Relationship of Neltnerite to other Species

Member of:Braunite Group
Other Members of Group:

- +
Abswurmbachite
CuMn
3+
6
(SiO
 
4
)O
 
8
Braunite
Mn
2+
 
Mn
3+
6
(SiO
 
4
)O
 
8
Related Minerals - Nickel-Strunz Grouping):

- +
9.AG.05Abswurmbachite
CuMn
3+
6
(SiO
 
4
)O
 
8
9.AG.05Braunite
Mn
2+
 
Mn
3+
6
(SiO
 
4
)O
 
8
9.AG.05Braunite-II
CaMn
3+
14
(SiO
 
4
)O
 
20
9.AG.10Långbanite
(Mn
2+
 
,Ca)
 
4
(Mn
3+
 
,Fe
3+
 
)
 
9
Sb
5+
 
(SiO
 
4
)
 
2
O
 
16
9.AG.15Malayaite
CaSn(SiO
 
4
)O
9.AG.15Titanite
CaTi(SiO
 
4
)O
9.AG.15Vanadomalayaite
CaV
4+
 
(SiO
 
4
)O
9.AG.15Natrotitanite
(Na
 
0.5
Y
 
0.5
)Ti(SiO
 
4
)O
9.AG.20Cerite-(Ce)
(Ce,Ca)
 
9
(Mg,Fe)(SiO
 
4
)
 
3
(HSiO
 
4
)
 
4
(OH)
 
3
9.AG.20Cerite-(La)
(La,Ce,Ca)
 
9
(Fe,Ca,Mg)(SiO
 
4
)
 
3
(HSiO
 
4
)
 
4
(OH)
 
3
9.AG.20Aluminocerite-(Ce)
(Ce,La,Ca)
 
9
(Al,Fe
3+
 
)(SiO
 
4
)
 
3
(HSiO
 
4
)
 
4
(OH)
 
3
9.AG.25Trimounsite-(Y)
Y
 
2
Ti
 
2
(SiO
 
4
)O
 
5
9.AG.25Yftisite-(Y)
(Y,Dy,Er)
 
4
(Ti,Sn)(SiO
 
4
)
 
2
O(F,OH)
 
6
9.AG.30Sitinakite
KNa
 
2
Ti
 
4
(SiO
 
4
)
 
2
O
 
5
(OH) · 4H
 
2
O
9.AG.35Kittatinnyite
Ca
 
2
Mn
 
2
Mn(SiO
 
4
)
 
2
(OH)
 
4
 · 9H
 
2
O
9.AG.40aNatisite
Na
 
2
Ti(SiO
 
4
)O
9.AG.40bParanatisite
Na
 
2
Ti(SiO
 
4
)O
9.AG.45Törnebohmite-(Ce)
(Ce,La)
 
2
Al(SiO
 
4
)
 
2
(OH)
9.AG.45Törnebohmite-(La)
(La,Ce)
 
2
Al(SiO
 
4
)
 
2
(OH)
9.AG.50Kuliokite-(Y)
Y
 
4
Al(SiO
 
4
)
 
2
(OH)
 
2
F
 
5
9.AG.55Chantalite
CaAl
 
2
(SiO
 
4
)(OH)
 
4
9.AG.60Mozartite
CaMn
3+
 
(SiO
 
4
)(OH)
9.AG.60Vuagnatite
CaAl(SiO
 
4
)(OH)
9.AG.65Hatrurite
Ca
 
3
(SiO
 
4
)O
9.AG.70Jasmundite
Ca
 
11
(SiO
 
4
)
 
4
O
 
2
S
9.AG.75Afwillite
Ca
 
3
(HSiO
 
4
)
 
2
 · 2H
 
2
O
9.AG.80Bultfonteinite
Ca
 
2
(HSiO
 
4
)F · H
 
2
O
9.AG.85Zoltaiite
BaV
4+
2
V
3+
12
(SiO
 
4
)
 
2
O
 
19
9.AG.90Tranquillityite
(Fe
2+
 
,Ca)
 
8
(Zr,Y)
 
2
Ti
 
3
(SiO
 
4
)
 
3
O
 
4
Related Minerals - Hey's Index Grouping:

- +
14.18.1Nambulite
(Li,Na)Mn
 
4
Si
 
5
O
 
14
(OH)
14.18.2Natronambulite
(Na,Li)(Mn,Ca)
 
4
Si
 
5
O
 
14
OH
14.18.3Zakharovite
Na
 
4
Mn
 
5
Si
 
10
O
 
24
(OH)
 
6
 · 6H
 
2
O
14.18.4Norrishite
KLiMn
3+
2
(Si
 
4
O
 
10
)O
 
2
14.18.5Shafranovskite
(Na,K)
 
6
(Mn,Fe)
 
3
Si
 
9
O
 
24
 · 6H
 
2
O
14.18.6Abswurmbachite
CuMn
3+
6
(SiO
 
4
)O
 
8
14.18.7Donpeacorite
(Mn
2+
 
,Mg)Mg[SiO
 
3
]
 
2
14.18.8Kanoite
Mn
2+
 
(Mg,Mn
2+
 
)Si
 
2
O
 
6
14.18.9Caryopilite
(Mn,Mg)
 
3
(Si
 
2
O
 
5
)(OH)
 
4
14.18.10Gonyerite
(Mn
2+
 
,Mg)
 
5
Fe
3+
 
(Fe
3+
 
Si
 
3
O
 
10
)(OH)
 
8
14.18.11Tirodite
14.18.12Manganhumite
(Mn
2+
 
,Mg)
 
7
(SiO
 
4
)
 
3
(OH)
 
2
14.18.13Bustamite
CaMn
2+
 
(Si
 
2
O
 
6
)
14.18.14Glaucochroite
CaMn
2+
 
SiO
 
4
14.18.15Truscottite
(Ca,Mn)
 
14
Si
 
24
O
 
58
(OH)
 
8
 · 2H
 
2
O
14.18.16Santaclaraite
CaMn
 
4
[Si
 
5
O
 
14
OH](OH) · H
 
2
O
14.18.17Ferrobustamite
Ca(Fe
2+
 
,Ca,Mn
2+
 
)(Si
 
2
O
 
6
)
14.18.18Johannsenite
CaMn
2+
 
Si
 
2
O
 
6
14.18.20Orlymanite
Ca
 
4
Mn
 
3
Si
 
8
O
 
20
(OH)
 
6
 · 2H
 
2
O
14.18.21Inesite
Ca
 
2
(Mn,Fe)
 
7
Si
 
10
O
 
28
(OH)
 
2
 · 5H
 
2
O
14.18.22Orientite
Ca
 
2
Mn
2+
 
Mn
3+
2
(Si
 
3
O
 
10
)(OH)
 
4
14.18.23Ruizite
Ca
 
2
Mn
3+
2
[(OH)
 
2
|H
 
2
Si
 
4
O
 
13
] · 2H
 
2
O
14.18.24Bostwickite
CaMn
 
6
Si
 
3
O
 
16
 · 7H
 
2
O
14.18.25Kittatinnyite
Ca
 
2
Mn
 
2
Mn(SiO
 
4
)
 
2
(OH)
 
4
 · 9H
 
2
O
14.18.26Lithiomarsturite
LiCa
 
2
Mn
 
2
Si
 
5
O
 
14
(OH)
14.18.27Sérandite
Na(Mn
2+
 
,Ca)
 
2
(HSi
 
3
O
 
9
)
14.18.28Kvanefjeldite
Na
 
4
(Ca,Mn)(Si
 
3
O
 
7
)
 
2
(OH)
 
2
14.18.29Marsturite
NaCaMn
 
3
Si
 
5
O
 
14
(OH)
14.18.30Raite
Na
 
4
Mn
2+
3
Ti
 
0.25
Si
 
8
O
 
20
(OH)
 
2
 · 10H
 
2
O
14.18.31Richterite
{Na}{CaNa}{Mg
 
5
}(Si
 
8
O
 
22
)(OH)
 
2
14.18.32Byelorussite-(Ce)
NaBa
 
2
Ce
 
2
MnTi
 
2
[Si
 
4
O
 
12
]
 
2
O
 
2
(F,OH) · H
 
2
O
14.18.33Deerite
(Fe,Mn)
 
6
(Fe,Al)
 
3
[Si
 
6
O
 
17
]O
 
3
(OH)
 
5
14.18.34Calderite
(Mn
2+
 
,Ca)
 
3
(Fe
3+
 
,Al)
 
2
(SiO
 
4
)
 
3
14.18.35Pyroxmangite
MnSiO
 
3
14.18.36Dannemorite
14.18.37Neotocite
(Mn,Fe,Mg)SiO
 
3
 · H
 
2
O
14.18.38Babingtonite
Ca
 
2
(Fe,Mn)FeSi
 
5
O
 
14
(OH)
14.18.39Manganbabingtonite
Ca
 
2
(Mn,Fe)FeSi
 
5
O
 
14
(OH)
14.18.40Örebroite
Mn
2+
3
(Fe
3+
 
,Sb
5+
 
)(SiO
 
4
)(O,OH)
 
3

Other Names for Neltnerite

Synonyms:
IMA1979-059
Other Languages:
German:Neltnerit
Russian:Нелтнерит
Spanish:Neltnerita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Neltnerite

Reference List:

- +
American Mineralogist (1983): 68: 282.

Internet Links for Neltnerite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Neltnerite details from Handbook of Mineralogy (PDF)
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    • Localities for Neltnerite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
    		Bull.Min.(1982) 105, 161-165
    Romania
     
    • Suceava Co.
      • Suceava district
        • Iacobeni (Jakobeny; Jacobeny; Jakabfalva)
    		http://minerals-of-the-carpathians.eu
    South Africa
     
    • Northern Cape Province
      • Kalahari manganese fields
        • Hotazel
    		Minerals of South Africa
    USA
     
    • Arizona
      • Cochise Co.
        • Mule Mts
          • Warren District
    		[MinRec 24:421]
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 312.
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 145, 188; Graeme, R. (1993), Bisbee revisited, Min.Rec.: 24: 421-436.
    • Michigan
      • Keweenaw Co.
        • Copper Harbor
    		Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
    Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
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