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Magbasite

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Edit Add Synonym Edit CIF structures Clear Cache

Formula:

KBaFe³⁺Mg₇Si₈O₂₂(OH)₂F₆

Originally assumed to be considerably Sc-bearing.

Hardness:

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.

Type Locality:

ⓘ Bayan Obo deposit (Bayun-Obo deposit; Baiyunebo deposit), Bayan Obo, Bayan Obo mining district, Baotou City (Baotou Prefecture), Inner Mongolia, China

Structurally related to carpholite.

Hide all sections | Show all sections

Classification of MagbasiteHide

IMA status:

Approved

Strunz 8th ed.:

8/C.32-10

Nickel-Strunz 10th (pending) ed.:

9.HA.25

9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements

Dana 8th ed.:

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

Physical Properties of MagbasiteHide

Hardness:

5 on Mohs scale

Optical Data of MagbasiteHide

Type:

Biaxial (-)

RI values:

n_α = 1.597 n_β = 1.609 n_γ = 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.

Surface Relief:

Moderate

Dispersion:

r < v weak

Chemical Properties of MagbasiteHide

Formula:

KBaFe³⁺Mg₇Si₈O₂₂(OH)₂F₆

Originally assumed to be considerably Sc-bearing.

Elements listed:

Ba, F, Fe, H, K, Mg, O, Si - search for minerals with similar chemistry

Common Impurities:

Crystallography of MagbasiteHide

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 Å³

Comment:

Space group Cmme (Cmma).

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0020127	Magbasite	Welch M D, Mitchell R H, Kampf A R, Chakhmouradian, 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		2014	Eldor carbonatite complex, Labrador Trough, Quebec, Canada	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Magbasite'
loop_
_publ_author_name
'Welch M D'
'Mitchell R H'
'Kampf A R'
'Chakhmouradian'
'Smith D'
'Carter M'
_journal_name_full 'Mineralogical Magazine'
_journal_volume 78 
_journal_year 2014
_journal_page_first 29
_journal_page_last 45
_publ_section_title
;
 Crystal structure and topological affinities of magbasite,
 KBaFe3+Mg7Si8O22(OH)2F6: a trellis structure related to amphibole and carpholite
;
_database_code_amcsd 0020127
_chemical_compound_source 'Eldor carbonatite complex, Labrador Trough, Quebec, Canada'
_chemical_formula_sum 'K Ba Fe1.633 Mg6.267 Al.1 Si8 O24 H2 F6'
_cell_length_a 18.9506
_cell_length_b 22.5045
_cell_length_c 5.2780
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 2250.928
_exptl_crystal_density_diffrn      3.386
_symmetry_space_group_name_H-M 'C m m a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  '1/2+x,-y,z'
  '+x,1/2-y,z'
  '1/2-x,y,-z'
  '-x,1/2+y,-z'
  '-x,y,z'
  '1/2-x,1/2+y,z'
  'x,-y,-z'
  '1/2+x,1/2-y,-z'
  '1/2+x,y,-z'
  '+x,1/2+y,-z'
  '1/2-x,-y,z'
  '-x,1/2-y,z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
KA   0.50000   0.25000   0.16710   1.00000   0.02180
BaB   0.25000   0.00000   0.00000   1.00000   0.01420
Fe1   0.25000   0.17858   0.00000   0.02600   0.00820
Mg1   0.25000   0.17858   0.00000   0.97400   0.00820
Mg2   0.25000   0.10953   0.50000   0.96700   0.00860
Fe2   0.25000   0.10953   0.50000   0.03300   0.00860
Mg3   0.25000   0.25000   0.50000   0.99700   0.00740
Fe3   0.25000   0.25000   0.50000   0.00300   0.00740
Mg4   0.08910   0.00000   0.50000   0.69400   0.00990
Fe4   0.08910   0.00000   0.50000   0.30600   0.00990
Al5   0.00000   0.00000   0.00000   0.10000   0.00780
Fe5   0.00000   0.00000   0.00000   0.90000   0.00780
Si1   0.10920   0.18227   0.33473   1.00000   0.00690
Si2   0.39170   0.11413   0.16654   1.00000   0.00720
O2   0.07852   0.25000   0.33140   1.00000   0.01100
O3   0.19395   0.18251   0.33430   1.00000   0.00840
O4   0.30704   0.11463   0.17270   1.00000   0.00910
O5   0.42215   0.15204   0.41100   1.00000   0.01090
O6   0.07865   0.15062   0.08150   1.00000   0.01010
O7   0.42252   0.04791   0.17180   1.00000   0.01010
O1   0.00000   0.04359   0.32200   1.00000   0.01090
H   0.00000   0.07700   0.31300   1.00000   0.05000
F1   0.30215   0.25000   0.16430   1.00000   0.01130
F2   0.17678   0.05164   0.37280   1.00000   0.01610
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
KA 0.02530 0.01940 0.02090 0.00000 0.00000 0.00000
BaB 0.02310 0.00886 0.01064 0.00000 0.00000 0.00000
Fe1 0.00970 0.00750 0.00750 0.00000 0.00030 0.00000
Mg1 0.00970 0.00750 0.00750 0.00000 0.00030 0.00000
Mg2 0.01020 0.00780 0.00780 0.00000 0.00130 0.00000
Fe2 0.01020 0.00780 0.00780 0.00000 0.00130 0.00000
Mg3 0.00900 0.00660 0.00650 0.00000 -0.00070 0.00000
Fe3 0.00900 0.00660 0.00650 0.00000 -0.00070 0.00000
Mg4 0.01130 0.00990 0.00840 -0.00210 0.00000 0.00000
Fe4 0.01130 0.00990 0.00840 -0.00210 0.00000 0.00000
Al5 0.00990 0.00680 0.00670 0.00000 0.00000 0.00000
Fe5 0.00990 0.00680 0.00670 0.00000 0.00000 0.00000
Si1 0.00810 0.00590 0.00670 -0.00020 0.00010 -0.00010
Si2 0.00830 0.00640 0.00680 0.00070 0.00000 0.00020
O2 0.01120 0.00590 0.01590 0.00000 -0.00040 0.00000
O3 0.00900 0.00810 0.00820 -0.00070 0.00000 -0.00060
O4 0.00940 0.00880 0.00900 0.00090 0.00050 0.00040
O5 0.01060 0.01200 0.01000 -0.00010 0.00050 -0.00320
O6 0.01020 0.01130 0.00880 -0.00010 -0.00010 -0.00290
O7 0.01210 0.00770 0.01040 0.00260 0.00070 0.00070
O1 0.01590 0.00600 0.01080 0.00000 0.00000 -0.00120
F1 0.01300 0.01030 0.01060 0.00000 0.00120 0.00000
F2 0.01910 0.01410 0.01530 -0.00430 0.00130 -0.00260

Type Occurrence of MagbasiteHide

Type Locality:

ⓘ Bayan Obo deposit (Bayun-Obo deposit; Baiyunebo deposit), Bayan Obo, Bayan Obo mining district, Baotou City (Baotou Prefecture), Inner Mongolia, China

Other Language Names for MagbasiteHide

German:Magbasit

Russian:Магбасит

Spanish:Magbasita

Related Minerals - Nickel-Strunz Grouping Hide

9.HA.05	Ertixiite	Na₂Si₄O₉	Iso.
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(Al_3.5Si_3.5)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[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 Hide

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	Tric. 1 : P1
17.2.9	Zinnwaldite

Other InformationHide

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 MagbasiteHide

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 MagbasiteHide

mindat.org URL:

https://www.mindat.org/min-2531.html
Please feel free to link to this page.

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External Links:

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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Localities for MagbasiteHide

This 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.

Locality ListHide

- 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). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.


Canada
Québec Nord-du-Québec Nunavik ⓘ Eldor carbonatite	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)
Inner Mongolia Baotou City (Baotou Prefecture) Bayan Obo mining district Bayan Obo ⓘ Bayan Obo deposit (Bayun-Obo deposit; Baiyunebo deposit) (TL)	Semenov, I. E., A. R Khomyakov, and A. V. Bukova (1965): Doklady Akademii Nauk SSSR 163(3), 718-719

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