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Manganvesuvianite

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N'Chwaning II Mine, N'Chwaning Mines, Kalahari manganese fields, Northern Cape Province, South Africa
© 2005 ROM

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Formula:
Ca
 
19
Mn(Al,Mn,Fe)
 
19
(Mg,Mn)
 
2
Si
 
18
O
 
69
(OH)
 
9
System:TetragonalColour:Deep red-brown, red, ...
Hardness:6 - 7
Name:In allusion to the dominance of Manganese in the formula and its relationship to Vesuvianite.


Vesuvianite Group. The manganese analogue of Vesuvianite.

Classification of Manganvesuvianite

IMA status:Approved 2000
Strunz 8th edition ID:8/C.26-
Nickel-Strunz 10th (pending) edition ID:9.BG.35

9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination
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Type Occurrence of Manganvesuvianite

Co-type Localities:Wessels Mine (Wessel's Mine), Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa
N'Chwaning II Mine, N'Chwaning Mines, Kalahari manganese fields, Northern Cape Province, South Africa
General Appearance of Type Material:Deep maroon red prisms up to 1.5 cm in length and as rock-forming mineral.

Physical Properties of Manganvesuvianite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent, Opaque
Colour:Deep red-brown, red, nearly black
Streak:white
Hardness (Mohs):6 - 7
Hardness Data:Measured
Cleavage:None Observed
Fracture:Conchoidal
Density (calculated):3.404 g/cm3

Crystallography of Manganvesuvianite

Crystal System:Tetragonal
Class (H-M):4/m - Dipyramidal
Space Group:P4/n
Cell Parameters:a = 15.575Å, c = 11.824Å
Ratio:a:c = 1 : 0.759
Unit Cell Volume:V 2868.5 ų
Z:2

Optical Data of Manganvesuvianite

Type:Uniaxial (-)
RI values: nω = 1.735 nε = 1.724
Maximum Birefringence:δ = 0.012

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Pleochroism:Strong
Comments:O dark red, E yellowish

Chemical Properties of Manganvesuvianite

Formula:
Ca
 
19
Mn(Al,Mn,Fe)
 
19
(Mg,Mn)
 
2
Si
 
18
O
 
69
(OH)
 
9
Essential elements:
All elements listed in formula:Al, Ca, Fe, H, Mg, Mn, O, Si

Relationship of Manganvesuvianite to other Species

Related to:
  • Vesuvianite Group
    • Related Minerals - Nickel-Strunz Grouping):
    9.BG.05Allanite-(Ce)
    {CaCe}{Al
     
    2
    		Fe
    2+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Allanite-(La)
    {CaLa}{Al
     
    2
    		Fe
    2+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Allanite-(Y)
    {CaY}{Al
     
    2
    		Fe
    2+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Clinozoisite
    {Ca
     
    2
    		}{Al
     
    3
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Dissakisite-(Ce)
    {CaCe}{Al
     
    2
    		Mg}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Dollaseite-(Ce)
    {CaCe}{MgAlMg}[F|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Epidote
    {Ca
     
    2
    		}{Al
     
    2
    		Fe
    3+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Epidote-(Pb)
    {CaPb}{Al
     
    3
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Khristovite-(Ce)
    {CaCe}{MgAlMn
    2+
     
    		}[F|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Mukhinite
    {Ca
     
    2
    		}{Al
     
    2
    		V
    3+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Piemontite
    {Ca
     
    2
    		}{Al
     
    2
    		Mn
    3+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Piemontite-(Sr)
    {CaSr}{Al
     
    2
    		Mn
    3+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Manganiandrosite-(La)
    {LaMn
    2+
     
    		}{Mn
    3+
     
    		AlMn
    2+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Tawmawite
    Ca
     
    2
    		(Al,Fe
    3+
     
    		,Cr)
     
    3
    		[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Manganipiemontite-(Sr)
    {CaSr}{Mn
    3+
     
    		AlMn
    3+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Ferriallanite-(Ce)
    {CaCe}{Fe
    3+
     
    		AlFe
    2+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Clinozoisite-(Sr)
    CaSrAl
     
    3
    		(Si
     
    2
    		O
     
    7
    		)(SiO
     
    4
    		)O(OH)
    9.BG.05Ferriepidote
    9.BG.05Manganiandrosite-(Ce)
    (Mn
    2+
     
    		,Ca)(Ce,REE)AlMn
    3+
     
    		Mn
    2+
     
    		(Si
     
    2
    		O
     
    7
    		)(SiO
     
    4
    		)O(OH)
    9.BG.05Dissakisite-(La)
    {CaLa}{Al
     
    2
    		Mg}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Vanadoandrosite-(Ce)
    {Mn
    2+
     
    		Ce}{V
    3+
     
    		AlMn
    2+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05Androsite-(La)
    9.BG.05Uedaite-(Ce)
    {Mn
    2+
     
    		Ce}{Al
     
    2
    		Fe
    2+
     
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.05IMA2006-055
    CaSrAl
     
    2
    		Fe
    3+
     
    		(Si
     
    2
    		O
     
    7
    		)(SiO
     
    4
    		)O(OH)
    9.BG.10Zoisite
    {Ca
     
    2
    		}{Al
     
    3
    		}[O|OH|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.15Macfallite
    Ca
     
    2
    		(Mn
    3+
     
    		,Al)
     
    3
    		[(OH)
     
    3
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.15Sursassite
    Mn
     
    2
    		Al
     
    3
    		[(OH)
     
    3
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.20Julgoldite-(Fe2+)
    Ca
     
    2
    		(Fe
    2+
     
    		,Mg)(Fe
    3+
     
    		,Al)
     
    2
    		[(OH)
     
    2
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		] · H
     
    2
    		O
    9.BG.20Okhotskite
    Ca
     
    8
    		(Mn,Mg)
     
    4
    		(Mn,Al,Fe)
     
    8
    		Si
     
    12
    		O
     
    56-n
    		(OH)
     
    n
    9.BG.20Pumpellyite-(Fe2+)
    Ca
     
    2
    		Fe
    2+
     
    		Al
     
    2
    		[(OH)
     
    2
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		] · H
     
    2
    		O
    9.BG.20Pumpellyite-(Fe3+)
    Ca
     
    2
    		(Fe
    3+
     
    		,Mg,Fe
    2+
     
    		)(Al,Fe
    3+
     
    		)
     
    2
    		[(OH,O)
     
    2
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		] · H
     
    2
    		O
    9.BG.20Pumpellyite-(Mg)
    Ca
     
    2
    		MgAl
     
    2
    		[(OH)
     
    2
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		] · H
     
    2
    		O
    9.BG.20Pumpellyite-(Mn2+)
    Ca
     
    2
    		(Mn
    2+
     
    		,Mg)(Al,Mn
    3+
     
    		,Fe
    3+
     
    		)
     
    2
    		[(OH)
     
    2
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		] · H
     
    2
    		O
    9.BG.20Shuiskite
    Ca
     
    2
    		(Mg,Al)(Cr,Al)
     
    2
    		[(OH)
     
    2
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		] · 2H
     
    2
    		O
    9.BG.20Julgoldite-(Fe3+)
    Ca
     
    2
    		(Fe
    3+
     
    		,Mg)(Fe
    3+
     
    		,Al)
     
    2
    		[(OH,O)
     
    2
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		] · H
     
    2
    		O
    9.BG.20Pumpellyite-(Al)
    Ca
     
    2
    		(Al,Fe
    2+
     
    		,Mg)Al
     
    2
    		[(OH,O)
     
    2
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		] · H
     
    2
    		O
    9.BG.20Poppiite
    Ca
     
    2
    		(V
    3+
     
    		,Fe
    3+
     
    		,Mg)(V
    3+
     
    		,Al)
     
    2
    		[(OH,O)
     
    2
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		] · H
     
    2
    		O
    9.BG.20Julgoldite-(Mg)
    Ca
     
    2
    		(Mg,Fe
    2+
     
    		)(Fe
    3+
     
    		,Al)
     
    2
    		[(OH)
     
    2
    		|SiO
     
    4
    		|Si
     
    2
    		O
     
    7
    		] · H
     
    2
    		O
    9.BG.25Ganomalite
    Pb
     
    9
    		Ca
     
    5
    		Mn[O|SiO
     
    4
    		|(Si
     
    2
    		O
     
    7
    		)
     
    4
    		]
    9.BG.30Rustumite
    Ca
     
    10
    		(Si
     
    2
    		O
     
    7
    		)
     
    2
    		(SiO
     
    4
    		)Cl
     
    2
    		(OH)
     
    2
    9.BG.35Vesuvianite
    Ca
     
    10
    		(Mg,Fe)
     
    2
    		Al
     
    4
    		Si
     
    9
    		O
     
    34
    		(OH)
     
    4
    9.BG.35Wiluite
    Ca
     
    19
    		(Al,Mg,Fe,Ti)
     
    13
    		(B,Al,[ ])
     
    5
    		Si
     
    18
    		O
     
    68
    		(O,OH)
     
    10
    9.BG.35Fluorvesuvianite
    Ca
     
    19
    		(Al,Mg,Fe
    2+
     
    		)
     
    13
    		[(F,OH,O)
     
    10
    		|(SiO
     
    4
    		)
     
    10
    		|(Si
     
    2
    		O
     
    7
    		)
     
    4
    		]
    9.BG.40Vyuntspakhkite-(Y)
    Y
     
    4
    		Al
     
    3
    		Si
     
    5
    		O
     
    18
    		(OH)
     
    5
    9.BG.45Dellaite
    Ca
     
    6
    		Si
     
    3
    		O
     
    11
    		(OH)
     
    2
    9.BG.50Gatelite-(Ce)
    CaCe
     
    3
    		Al
     
    2
    		(Al,Mg)(Mg,Fe
    2+
     
    		,Al)[(O,F)|(OH,O)
     
    2
    		|(SiO
     
    4
    		)
     
    3
    		|Si
     
    2
    		O
     
    7
    		]
    9.BG.55Västmanlandite-(Ce)
    Ca(Ce,La)
     
    3
    		Al
     
    2
    		Mg
     
    2
    		 [F|(OH)
     
    2
    		|(SiO
     
    4
    		)
     
    3
    		|Si
     
    2
    		O
     
    7
    		]

    Other Names for Manganvesuvianite

    Synonyms:
    IMA2000-040
    German names:
    ManganvesuvianManganvesuvianit
    Russian names:
    Манганвезувианит
    Spanish names:
    Manganvesuvianita

    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 Manganvesuvianite

    Reference List:Armbruster, T. and Gnos, E. (2000a) Tetrahedral vacancies and cation ordering in low-temperature Mn-bearing vesuvianites: indication of a hydrogranet-like substitution. American Mineralogist: 85: 570-577.

    Armbruster,T., E. Gnos, R. Dixon, J. Gutzmer, C. Hejny, N. Döbelin & O. Medenbach (2002): Manganvesuvianite and Tweddillite, two new Mn3+-silicate minerals from the Kalahari Manganese fields, South Africa.- Mineralogical Magazine: 66: 137-150.

    Internet Links for Manganvesuvianite

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    Localities for Manganvesuvianite

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    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.
    South Africa
     
    • Northern Cape Province
      • Kalahari manganese fields
        • Hotazel
    		T. Armbruster et al. (2002) Min. Mag. 66, 137-150; European Journal of Mineralogy: 17(2): 375-382.
        • N'Chwaning Mines
    		T. Armbruster et al. (2002) Min. Mag. 66, 137-150
    Sweden
     
    • Värmland
      • Filipstad
        • Pajsberg
    Mineral and/or Locality
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