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Magbasite

Formula:
KBa(Al,Sc)(Mg,Fe)
 
6
Si
 
6
O
 
20
F
 
2
Hardness:5
This page provides mineralogical data about Magbasite.

Classification of Magbasite

IMA status:Approved
Strunz 8th edition ID:8/C.32-10
Nickel-Strunz 10th (pending) edition ID:9.HA.25

9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
Dana 8th edition ID:69.2.1c.1

69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2
Hey's CIM Ref.:17.2.10

17 : Silicates Containing other Anions
2 : Silicates with fluoride
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Type Occurrence of Magbasite

Type Locality:Bayan Obo (Bayun-Obo; Baiyunebo) deposit, Bayan Obo, Darhan Muminggan United Banner, Baotou League, Inner Mongolia Autonomous Region, China
Year of Discovery:1965

Physical Properties of Magbasite

Hardness (Mohs):5

Optical Data of Magbasite

Type:Biaxial (-)
RI values: nα = 1.597 nβ = 1.609 nγ = 1.615
2V:Measured: 70° , Calculated: 70°
Maximum Birefringence:δ = 0.018

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

Chemical Properties of Magbasite

Formula:
KBa(Al,Sc)(Mg,Fe)
 
6
Si
 
6
O
 
20
F
 
2
Essential elements:Al, Ba, F, K, Mg, O, Si
All elements listed in formula:Al, Ba, F, Fe, K, Mg, O, Sc, Si
Common Impurities:Ca

Relationship of Magbasite to other Species

Related Minerals - Nickel-Strunz Grouping):
9.HA.05Ertixiite
Na
 
2
Si
 
4
O
 
9
9.HA.10Kenyaite
Na
 
2
Si
 
22
O
 
41
(OH)
 
8
·6H
 
2
O
9.HA.20Wawayandaite
Ca
 
6
Mn
 
2
BBe
 
9
Si
 
6
O
 
23
(OH,Cl)
 
15
9.HA.30Afanasyevaite
Ca
 
8
[Si
 
2
O
 
7
]OCl
 
2
9.HA.40Igumnovite
Ca
 
3
Al
 
2
(SiO
 
4
)
 
2
Cl
 
4
9.HA.50Rudenkoite
Sr
 
3
(Al
 
3.5
Si
 
3.5
)O
 
10
(OH,O)
 
8
Cl
 
2
·H
 
2
O
9.HA.55Foshallasite
Ca
 
3
[Si
 
2
O
 
7
] · 3H
 
2
O(?)
9.HA.60Nagelschmidtite
Ca
 
7
[PO
 
4
|SiO
 
4
]
 
2
9.HA.65Caryochroite
(Na,Sr)
 
3
(Fe
3+
 
,Mg)
 
10
[(O,OH)
 
9
|Ti
 
2
Si
 
12
O
 
37
] ·(H
 
2
O, O, OH)
 
17
9.HA.70Juanite
Ca
 
10
Mg
 
4
Al
 
2
Si
 
11
O
 
39
·4H
 
2
O or near
Related Minerals - Hey's Index Grouping:
17.2.1Topaz
Al
 
2
[(F,OH)
 
2
|SiO
 
4
]
17.2.2Polylithionite
KLi
 
2
Al[(F,OH)
 
2
|Si
 
4
O
 
10
]
17.2.3Leifite
(Na,H
 
2
O)Na
 
6
[F
 
2
|Be
 
2
Al
 
2
(Al,Si)Si
 
15
O
 
39
]
17.2.4Lepidolite
17.2.5Meliphanite
(Ca,Na)
 
2
(Be,Al)[Si
 
2
O
 
6
(OH,F)]
17.2.6Sarcolite
Na
 
2
Ca
 
12
(Ca,K,Fe,Sr,Mg)
 
2
Al
 
8
Si
 
12
(P,Si)O
 
52
F
 
2
17.2.7Götzenite
Na
 
2
Ca
 
5
Ti[F
 
4
|(Si
 
2
O
 
7
)
 
2
]
17.2.8Kuliokite-(Y)
Y
 
4
Al(SiO
 
4
)
 
2
(OH)
 
2
F
 
5
17.2.9Zinnwaldite
KLiFe
2+
 
Al[(F,OH)
 
2
|AlSi
 
3
O
 
10
]
17.2.11Eckermannite
[Na][Na
 
2
][(Mg,Fe
2+
 
)
 
4
Al][(OH)
 
2
|Si
 
8
O
 
22
]

Other Names for Magbasite

German names:
Magbasit
Spanish names:
Magbasita

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 Magbasite

Reference List:Semenov, I. E., A. R Khomyakov, and A. V. Bukova (1965): Magbasite - New mineral. Doklady Akademii Nauk SSSR 163(3), 718-719 (in Russian). - American Mineralogist (1966), 51, 530 (abstract).

Contributions to Mineralogy and Petrology (1979), 69, 249.

Internet Links for Magbasite

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  • Raman and XRD data at RRUFF project
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    Localities for Magbasite

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    China
     
    • Inner Mongolia Autonomous Region
      • Baotou League
        • Darhan Muminggan United Banner
          • Bayan Obo
    		Semenov, I. E., A. R Khomyakov, and A. V. Bukova (1965): Doklady Akademii Nauk SSSR 163(3), 718-719
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