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Magnesionigerite-2N1S

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Formula:
Sn(Mg,Fe)Al
 
6
O
 
11
(OH)
System:TrigonalColour:brown
Hardness:8
Member of:Nigerite Group
Name:Originally described as Pengzhizhongite-6H, renamed according to the new Nigerite group nomenclature (Armbruster, 2002).


Nigerite Group.

Classification of Magnesionigerite-2N1S

IMA status:Approved
Strunz 8th edition ID:4/C.07-
Nickel-Strunz 10th (pending) edition ID:4.FC.20

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
C : Hydroxides with OH, without H2O; corner-sharing octahedra
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Type Occurrence of Magnesionigerite-2N1S

Type Locality:Baiwu mining district, Anhua Co., Yiyang Prefecture, Hunan Province, China

Physical Properties of Magnesionigerite-2N1S

Colour:brown
Hardness (Mohs):8
Hardness Data:Measured

Crystallography of Magnesionigerite-2N1S

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Space Group:P3m1 {P3 2/m 1}
Cell Parameters:a = 5.69Å, c = 13.78Å
Ratio:a:c = 1 : 2.422
Unit Cell Volume:V 386.37 ų (Calculated from Unit Cell)
Z:2

Optical Data of Magnesionigerite-2N1S

Type:Uniaxial (+)
RI values: nω = 1.802 nε = 1.814
Maximum Birefringence:δ = 0.012

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

Chemical Properties of Magnesionigerite-2N1S

Formula:
Sn(Mg,Fe)Al
 
6
O
 
11
(OH)
Essential elements:Al, H, Mg, O, Sn
All elements listed in formula:Al, Fe, H, Mg, O, Sn

Relationship of Magnesionigerite-2N1S to other Species

Member of:Nigerite Group
Other Members of Group:

- +
Ferronigerite-2N1S
Sn(Fe,Mg)Al
 
6
O
 
11
(OH)
Ferronigerite-6N6S
Sn(Fe,Mg)
 
2
Al
 
8
O
 
15
(OH)
Magnesionigerite-6N6S
Sn(Mg,Fe)
 
2
Al
 
8
O
 
15
(OH)
Zinconigerite-2N1S
Sn(Zn,Fe,Mg)Al
 
6
O
 
11
(OH)
Zinconigerite-6N6S
Related Minerals - Nickel-Strunz Grouping):

- +
4.FC.05Bernalite
Fe(OH)
 
3
 · nH
 
2
O (n = 0.0 to 0.25)
4.FC.05Dzhalindite
In(OH)
 
3
4.FC.05Söhngeite
Ga(OH)
 
3
4.FC.10Burtite
Ca[Sn(OH)
 
6
]
4.FC.10Mushistonite
(Cu,Zn,Fe
2+
 
)[Sn(OH)
 
6
]
4.FC.10Natanite
Fe
2+
 
[Sn(OH)
 
6
]
4.FC.10Schoenfliesite
Mg[Sn(OH)
 
6
]
4.FC.10Vismirnovite
Zn[Sn(OH)
 
6
]
4.FC.10Wickmanite
Mn
2+
 
[Sn(OH)
 
6
]
4.FC.15Jeanbandyite
(Fe
2+
 
,Mn
2+
 
)[Sn
4+
 
(OH)
 
6
]
4.FC.15Mopungite
Na[Sb
5+
 
(OH)
 
6
]
4.FC.15Stottite
Fe
2+
 
[Ge
4+
 
(OH)
 
6
]
4.FC.15Tetrawickmanite
Mn
2+
 
[Sn
4+
 
(OH)
 
6
]
4.FC.20Ferronigerite-2N1S
Sn(Fe,Mg)Al
 
6
O
 
11
(OH)
4.FC.20Magnesionigerite-6N6S
Sn(Mg,Fe)
 
2
Al
 
8
O
 
15
(OH)
4.FC.20Ferronigerite-6N6S
Sn(Fe,Mg)
 
2
Al
 
8
O
 
15
(OH)
4.FC.20Zinconigerite-2N1S
Sn(Zn,Fe,Mg)Al
 
6
O
 
11
(OH)
4.FC.20Zinconigerite-6N6S
4.FC.25Magnesiotaaffeite-6N’3S
Mg
 
2
BeAl
 
6
O
 
12
4.FC.25Magnesiotaaffeite-2N’2S
Mg
 
3
Al
 
8
BeO
 
16

Other Names for Magnesionigerite-2N1S

Synonyms:
Pengzhizhongite-6HPengzhizhongite-6TPenzhizhongitePenzhizhongite-6HPenzhizhongite-6T
Other Languages:

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 Magnesionigerite-2N1S

Reference List:

- +
Chen Jingzhong, Yang Guangming, Pan Zhaolu, Shi Nicun, and Peng Zhizhong (1989): Discovery and study of pengzhizhongite-6H - A new mineral. Acta Mineralogica Sinica 9(1), 20-24 (in Chinese with English abstract). - American Mineralogist 76, 1730-1731 (abstract).

Armbruster, T. (2002): Revised nomenclature of högbomite, nigerite, and taaffeite minerals. European Journal of Mineralogy, 14, 389-395.

Internet Links for Magnesionigerite-2N1S

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    • Localities for Magnesionigerite-2N1S

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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.
    China
     
    • Hunan Province
      • Yiyang Prefecture
        • Anhua Co.
    		Chen Jingzhong, Yang Guangming, Pan Zhaolu, Shi Nicun, and Peng Zhizhong (1989): Acta Mineralogica Sinica 9(1), 20-24.
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