Magbasite
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Formula:
KBaFe3+Mg7Si8O22(OH)2F6
Originally assumed to be considerably Sc-bearing.
Hardness:
5
Crystal System:
Orthorhombic
Name:
Named by I.E. Semenov, A.R. Khomyakov, A.V. Bukova in 1965 for the chemical composition that includes the elements MAGnesium and BArium.
Classification of Magbasite
Approved
8/C.32-10
9.HA.25
9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
69.2.1c.1
69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2
69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2
17.2.10
17 : Silicates Containing other Anions
2 : Silicates with fluoride
17 : Silicates Containing other Anions
2 : Silicates with fluoride
Physical Properties of Magbasite
Hardness:
5 on Mohs scale
Optical Data of Magbasite
Type:
Biaxial (-)
RI values:
nα = 1.597 nβ = 1.609 nγ = 1.615
2V:
Measured: 70° , Calculated: 70°
Max Birefringence:
δ = 0.018
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v weak
Chemical Properties of Magbasite
Formula:
KBaFe3+Mg7Si8O22(OH)2F6
Originally assumed to be considerably Sc-bearing.
Originally assumed to be considerably Sc-bearing.
Common Impurities:
Ca
Crystallography of Magbasite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Cmma
Cell Parameters:
a = 18.9506(3) Å, b = 22.5045(3) Å, c = 5.2780(1) Å
Ratio:
a:b:c = 0.842 : 1 : 0.235
Unit Cell V:
2250.93 ų
Z:
4
Comment:
Space group Cmme (Cmma).
Type Occurrence of Magbasite
Other Language Names for Magbasite
Related Minerals - Nickel-Strunz Grouping
| 9.HA.05 | Ertixiite | Na2Si4O9 | |
| 9.HA.10 | Kenyaite | Na2Si22O41(OH)8 · 6H2O | Mon. |
| 9.HA.20 | Wawayandaite | Ca6Mn2BBe9Si6O23(OH,Cl)15 | Mon. |
| 9.HA.30 | Afanasyevaite | Ca8[Si2O7]OCl2 | |
| 9.HA.40 | Igumnovite | Ca3Al2(SiO4)2Cl4 | Iso. |
| 9.HA.50 | Rudenkoite | Sr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2O | Mon. |
| 9.HA.55 | Foshallasite | Ca3[Si2O7] · 3H2O(?) | |
| 9.HA.60 | Nagelschmidtite | Ca7(SiO4)2(PO4)2 | Hex. 6 : P61 |
| 9.HA.65 | Caryochroite | (Na,Sr)3(Fe3+,Mg)10[(O,OH)9|Ti2Si12O37] · (H2O,O,OH)17 | Mon. |
| 9.HA.70 | Juanite | Ca10Mg4Al2Si11O39 · 4H2O or near | |
| 9.HA.75 | Tacharanite | Ca12Al2Si18O33 (OH)36 | Mon. |
| 9.HA.80 | Oyelite | Ca10Si8B2O29 · 12.5H2O | Orth. |
| 9.HA.85 | Denisovite | K14+x(Ca,Na,Mn,Fe)48[Si60O162]F16(Ox,OH4−x)·2H2O | Mon. |
| 9.HA.90 | Tiettaite | (Na,K)17FeTiSi16O29(OH)30 · 2H2O | Orth. mmm (2/m 2/m 2/m) : Cmcm |
Related Minerals - Hey's Chemical Index of Minerals Grouping
| 17.2.1 | Topaz | Al2(SiO4)(F,OH)2 | Orth. mmm (2/m 2/m 2/m) |
| 17.2.2 | Polylithionite | KLi2Al(Si4O10)(F,OH)2 | Mon. 2/m : B2/b |
| 17.2.3 | Leifite | (Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2 | Trig. 3m : P3m1 |
| 17.2.5 | Meliphanite | (Ca,Na)2(Be,Al)[Si2O6(OH,F)] | Tet. 4 : I4 |
| 17.2.6 | Sarcolite | Na4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl) | Tet. |
| 17.2.7 | Götzenite | NaCa6Ti(Si2O7)2OF3 | Tric. 1 : P1 |
| 17.2.8 | Kuliokite-(Y) | Y4Al(SiO4)2(OH)2F5 | |
| 17.2.9 | Zinnwaldite |
Other Information
Health Risks:
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:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Semenov, I.E., Khomyakov, A.R., Bukova, A.V. (1965) Magbasite - New mineral. Doklady Akademii Nauk SSSR: 163(3): 718-719. (in Russian)
Fleischer, M. (1966) New mineral names. American Mineralogist: 51: 530.
International Mineralogical Association (1968) International Mineralogical Association: Commission on new minerals and mineral names. Mineralogical Magazine: 36: 1143-1145.
(1979) Contributions to Mineralogy and Petrology: 69: 249.
Welch, M.D., Mitchell, R.H., Kampf, A.R., Chakhmouradian, A.R., Smith, D., Carter, M. (2014) Crystal structure and topological affinities of magbasite, KBaFe3+Mg7Si8O22(OH)2F6: a trellis structure related to amphibole and carpholite. Mineralogical Magazine: 78: 29-45.
Cámara, F., Gagne, O.C., Uvarova, Y., Belakovskiy, D.I. (2014) New mineral names. American Mineralogist: 99: 2437-2444.
Internet Links for Magbasite
mindat.org URL:
https://www.mindat.org/min-2531.html
Please feel free to link to this page.
Please feel free to link to this page.
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Localities for Magbasite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Canada | |
| Mitchell, R.H. & Smith, D.L. (2017) Geology and mineralogy of the Ashram zone carbonatite, Eldor complex, Quebec. Ore Geology Reviews 86, 784-806. |
China (TL) | |
| Semenov, I. E., A. R Khomyakov, and A. V. Bukova (1965): Doklady Akademii Nauk SSSR 163(3), 718-719 |