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Namansilite

Big Photo

Cerchiara Mine, Faggiona, Borghetto Vara, La Spezia Province, Liguria, Italy
© R. Bracco

Show Namansilite Photos (4)
Formula:
NaMn
3+
 
[Si
 
2
O
 
6
]
System:MonoclinicColour:dark brownish red, ...
Hardness:6 - 7


Pyroxene Group - Clinopyroxene Subgroup.

Classification of Namansilite

IMA status:Approved 1989
Strunz 8th edition ID:8/F.01-145
Nickel-Strunz 10th (pending) edition ID:9.DA.25

9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
Dana 8th edition ID:65.1.3c.3

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2
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Type Occurrence of Namansilite

Co-type Localities:Dzhavodi Area, Ir-Nimi manganese deposit, Taikan Ridge, Khabarovskiy Kray, Far-Eastern Region, Russia
Zaoblachnyi Area, Ir-Nimi manganese deposit, Taikan Ridge, Khabarovskiy Kray, Far-Eastern Region, Russia
Year of Discovery:1992

Physical Properties of Namansilite

Colour:dark brownish red, purplish red
Streak:brown-red
Hardness (Mohs):6 - 7
Cleavage:Perfect

Crystallography of Namansilite

Crystal System:Monoclinic
Cell Parameters:a = 9.51Å, b = 8.61Å, c = 5.35Å
β = 105.12°
Ratio:a:b:c = 1.105 : 1 : 0.621
Unit Cell Volume:V 422.90 ų (Calculated from Unit Cell)

Optical Data of Namansilite

Type:Biaxial (-)
RI values: nα = 1.746 nβ = 1.769 nγ = 1.837
2V:Measured: 15° to 20°, Calculated: 64°
Maximum Birefringence:δ = 0.091

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v

Chemical Properties of Namansilite

Formula:
NaMn
3+
 
[Si
 
2
O
 
6
]
Essential elements:Mn, Na, O, Si
All elements listed in formula:Mn, Na, O, Si
Common Impurities:Al,Ti,Fe,Mg,Ca,K,Sr,Ba

Relationship of Namansilite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.DA.05Donpeacorite
(Mn
2+
 
,Mg)Mg[SiO
 
3
]
 
2
9.DA.05Enstatite
Mg
 
2
[SiO
 
3
]
 
2
9.DA.05Ferrosilite
Fe
 
2
[SiO
 
3
]
 
2
9.DA.05Akimotoite
(Mg,Fe
2+
 
)SiO
 
3
9.DA.10Clinoenstatite
Mg
 
2
[Si
 
2
O
 
6
]
9.DA.10Clinoferrosilite
Fe
2+
 
(Fe
2+
 
,Mg)[Si
 
2
O
 
6
]
9.DA.10Kanoite
Mn
2+
 
(Mg,Mn
2+
 
)[Si
 
2
O
 
6
]
9.DA.10Pigeonite
(Mg,Fe
2+
 
,Ca)(Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.15Augite
(Ca,Na)(Mg,Fe
2+
 
,Al,Fe
3+
 
,Ti)[(Si,Al)
 
2
O
 
6
]
9.DA.15Diopside
CaMg[Si
 
2
O
 
6
]
9.DA.15Esseneite
CaFe
3+
 
[AlSiO
 
6
]
9.DA.15Hedenbergite
CaFe
2+
 
[Si
 
2
O
 
6
]
9.DA.15Johannsenite
CaMn
2+
 
[Si
 
2
O
 
6
]
9.DA.15Petedunnite
Ca(Zn,Mn
2+
 
,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.20Aegirine-augite
(Na,Ca)(Fe,Fe,Mg,Al)Si
 
2
O
 
6
9.DA.20Omphacite
(Ca,Na)(Mg,Al)[Si
 
2
O
 
6
]
9.DA.25Aegirine
NaFe
3+
 
[Si
 
2
O
 
6
]
9.DA.25Jadeite
Na(Al,Fe
3+
 
)[Si
 
2
O
 
6
]
9.DA.25Jervisite
(Na,Ca,Fe
2+
 
)(Sc,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.25Kosmochlor
NaCr[Si
 
2
O
 
6
]
9.DA.25Natalyite
Na(V
3+
 
,Cr)[Si
 
2
O
 
6
]
9.DA.30Spodumene
LiAl[Si
 
2
O
 
6
]

Other Names for Namansilite

Synonyms:
IMA1989-026
German names:
Namansilit
Russian names:
Намансилит
Spanish names:
Namansilita

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 Namansilite

Reference List:New Minerals (1997), New Minerals 1990-1994.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 121(1): 89-94.

Mineralogical Magazine: 57: 533-538.

Neues Jahrbuch für Mineralogie, Monatshefte (1989): 59-68.

Neues Jahrbuch für Mineralogie, Abhandlungen (1994): 168: 1-13.

Internet Links for Namansilite

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

    Hide Locality List
    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.
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    (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.
    Australia
     
    • New South Wales
      • Darling Co.
        • Tamworth
    		Min.Mag.: 60:369-374.
    Germany
     
    • Rhineland-Palatinate
      • Eifel Mts
        • Mayen
          • Ettringen
    		Blass, G., Emmerich, F., Graf, HW., Schäfer, Ch., Tschörtner, J., (2006): Minerale der Eifelvulkane, Version 1.0, CD, published by authors
    Italy
     
    • Liguria
      • La Spezia Province
        • Borghetto Vara
          • Faggiona
    		Min.Mag.: 60:369-374.
    Russia
     
    • Far-Eastern Region
      • Khabarovskiy Kray
        • Taikan Ridge
    		[MinRec 27:306]
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