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Magnesio-foitite

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Formula:
(□,Na)(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
System:
Trigonal
Colour:
Pale bluish-grey
Lustre:
Earthy
Hardness:
7
Name:
Named for its relationship to foitite

Classification of Magnesio-foitite

Approved 1998
9.CK.05

9 : SILICATES (Germanates)
C : Cyclosilicates
K : [Si6O18]12- 6-membered single rings, with insular complex anions
Dana 7th ed.:
61.3.1.2
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Type Occurrence of Magnesio-foitite

Physical Properties of Magnesio-foitite

Earthy
Colour:
Pale bluish-grey
Streak:
Not reported.
Hardness (Mohs):
7

Crystallography of Magnesio-foitite

Crystal System:
Trigonal

Optical Data of Magnesio-foitite

Type:
Uniaxial (-)
RI values:
nω = 1.650 nε = 1.624
Max Birefringence:
δ = 0.026
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Magnesio-foitite

Formula:
(□,Na)(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Essential elements:
All elements listed in formula:

Relationship of Magnesio-foitite to other Species

Other Members of Group:
AdachiiteCaFe3Al6(Si5AlO18)(BO3)3(OH)3(OH)
Chromium-draviteNa(Mg3)Cr63+(Si6O18)(BO3)3(OH)3(OH)
Chromo-alumino-povondraiteNa(Cr3)(Al4Mg2)(Si6O18)(BO3)3(OH)3O
DarrellhenryiteNa(LiAl2)Al6(BO3)3Si6O18(OH)3O
DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)
Fluor-buergeriteNa(Fe33+)Al6(Si6O18)(BO3)3O3F
Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3F
Fluor-elbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3F
Fluor-feruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3F
Fluor-liddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3F
Fluor-schorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3F
Fluor-tsilaisiteNa(Mn2+)3Al6(Si6O18)(BO3)3(OH)3F
Fluor-uviteCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3F
Foitite(□,Na)(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3OH
LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Luinaite-(OH)Na(Fe2+)3Al6(Si6O18)(BO3)3(OH)3(OH)
MaruyamaiteK(MgAl2)(Al5Mg)(BO3)3(Si6O18)(OH)3O
OleniteNa(Al3)Al6(Si6O18)(BO3)3O3(OH)
Oxy-chromium-draviteNa(Cr)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O
Oxy-draviteNa(MgAl2)MgAl5(Si6O18)(BO3)3(OH)3O
Oxy-rossmanite☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3O
Oxy-schorlNa(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3O
Oxy-vanadium-draviteNa(V)3(V4Mg2)Si6O18(BO3)3(OH)3O
PovondraiteNaFe33+(Mg2Fe43+)(Si6O18)(BO3)3(OH)3O
Rossmanite☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH)
SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
TsilaisiteNa(Mn2+)3Al6(Si6O18)(BO3)3(OH)3(OH)
UM2000-64-SiO:BFeHKMgK, Mg, Fe, Si, B, O, H
Unnamed (Pb-dominant Tourmaline)(Pb,Na)(Li,Al)3Al6(Si6O18)(BO3)3(OH)3(F,OH)
UviteCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)
Vanadio-oxy-chromium-draviteNa(V)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O
Vanadio-oxy-draviteNaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O
9.CK.Fluor-schorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3F
9.CK.05Fluor-buergeriteNa(Fe33+)Al6(Si6O18)(BO3)3O3F
9.CK.05Chromium-draviteNa(Mg3)Cr63+(Si6O18)(BO3)3(OH)3(OH)
9.CK.05DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
9.CK.05ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
9.CK.05FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)
9.CK.05Foitite(□,Na)(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3OH
9.CK.05LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
9.CK.05OleniteNa(Al3)Al6(Si6O18)(BO3)3O3(OH)
9.CK.05PovondraiteNaFe33+(Mg2Fe43+)(Si6O18)(BO3)3(OH)3O
9.CK.05SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
9.CK.05Rossmanite☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH)
9.CK.05Oxy-vanadium-draviteNa(V)3(V4Mg2)Si6O18(BO3)3(OH)3O
9.CK.05Oxy-draviteNa(MgAl2)MgAl5(Si6O18)(BO3)3(OH)3O
9.CK.05Oxy-rossmanite☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3O
9.CK.05Chromo-alumino-povondraiteNa(Cr3)(Al4Mg2)(Si6O18)(BO3)3(OH)3O
9.CK.05Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3F
9.CK.05Fluor-uviteCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3F
9.CK.10Abenakiite-(Ce)Na26Ce6(Si6O18)(PO4)6(CO3)6(SO3)
9.CK.15ScawtiteCa7(Si3O9)2CO3 · 2H2O
9.CK.20Steenstrupine-(Ce)Na14Mn22+(Fe3+,Mn3+)2Ce6(Zr,Th)(Si6O18)2(PO4)6(HPO4)(OH)2 · 2H2O
9.CK.20ThorosteenstrupineCaMnThSi4O11(OH)F · 6H2O
61.3.1.1Foitite(□,Na)(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3OH
61.3.1.3Rossmanite☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH)
61.3.1.4LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
61.3.1.5UviteCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)
61.3.1.5Fluor-uviteCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3F
61.3.1.6FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)
61.3.1.7Fluor-buergeriteNa(Fe33+)Al6(Si6O18)(BO3)3O3F
61.3.1.8PovondraiteNaFe33+(Mg2Fe43+)(Si6O18)(BO3)3(OH)3O
61.3.1.9OleniteNa(Al3)Al6(Si6O18)(BO3)3O3(OH)
61.3.1.10ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
61.3.1.11DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
61.3.1.12SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
61.3.1.13Chromium-draviteNa(Mg3)Cr63+(Si6O18)(BO3)3(OH)3(OH)
61.3.1.14Oxy-vanadium-draviteNa(V)3(V4Mg2)Si6O18(BO3)3(OH)3O

Other Names for Magnesio-foitite

Name in Other Languages:

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 Magnesio-foitite

Reference List:
Hawthorne, F.C., Selway, J.B., Kato, A., Matsubara, S., Shimizu, M., Grice, J.D., Vajdak, J. (1999) Magnesiofoitite, _(Mg2Al)Al6(Si6O18)(BO3)3(OH)4, a new alkali-deficient tourmaline. Canadian Mineralogist: 37: 1439-1443.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Henry, D., Novák, M., Hawthorne, F.C., Ertl, A., Dutrow, B.L., Uher, P. & Pezzotta, F. (2011): Nomenclature of the tourmaline supergroup minerals. Am. Mineral., 96, 895-913.

Internet Links for Magnesio-foitite

Localities for Magnesio-foitite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Australia
 
  • Tasmania
    • Queenstown district
Ralph Bottrill et al in prep.
Bottrill & Baker (in prep) Catalogue of minerals of Tasmania
Bottrill RS & Baker, WE (in prep) Catalogue of Minerals of Tasmania. Mineral Resources Tasmania
Canada
 
  • Saskatchewan
    • Athabasca Basin
Rosenberg P. E., Foit F. F. (2006): Magnesiofoitite from the uranium deposits of the Athabasca basin, Saskatchewan, Canada. Canadian Mineralogist, 44, 959-965.
Rosenberg P. E., Foit F. F. (2006): Magnesiofoitite from the uranium deposits of the Athabasca basin, Saskatchewan, Canada. Canadian Mineralogist, 44, 959-965.
China
 
  • Sichuan Province
    • Mianyang Prefecture
      • Pingwu Co.
        • Mt Xuebaoding
          • Huya township
Pavel Kartashov data
Italy
 
  • Piedmont
    • Torino Province
      • Germanasca valley
        • Prali
Ciriotti, M.E. & Biagioni, C. (2011): Pot-pourri 2011: identificazioni di minerali di interesse. Micro, 3/2011, 125-133
Japan
 
  • Honshu Island
    • Chubu region
      • Yamanashi prefecture
        • Mitomi-mura
[AmMin 85:1562]
  • Kyushu Region
    • Miyazaki prefecture
      • Hinokage-cho
Uehara, S., et al (2014) Minerals from Kyushu and Yamaguchi. (Fukuouka Mineral Club, 355 pp.)
Madagascar
 
  • Fianarantsoa Province
    • Matsiatra Region
      • Ikalamavony Pegmatite Field
        • Ikalamavony District
http://www.minrec.org/pdfs/Toms%20Online%20report%2038.pdf
Russia
 
  • Urals Region
    • Middle Urals
      • Sverdlovskaya Oblast'
        • Ekaterinburg (Sverdlovsk)
          • Berezovskii (Berezovskii Zavod)
I.A. Baksheev and O.E. Kudryavtseva : "Composition of some pegmatitic, hydrothermal and metamorphic dravites from the Urals, Russia", Bull. Liaison SFMC, Vol. 16, 2004; Baksheev, I. A. & Kudryavtseva, O. E. (2004): Nickeloan tourmaline from the Berezovskoe gold deposit, Middle Urals, Russia. Canadian Mineralogist 42, 1065-1078.
Pavel M. Kartashov analytical data (2011)
The Canadian Mineralogist, V 42, 2004, pp. 1065-1078.
Slovakia
 
  • Bratislava Region
    • Pezinok Co.
      • Pezinok
        • Slnečné Valley
Uher P., Bačík P., Ozdín D., 2009: Tourmaline (magnesiofoitite and dravite) in quartz vein near Limbach, Malé Karpaty Mts. (Slovakia). Mineralia Slovaca, 41, 445-456.
USA
 
  • California
    • Mono Co.
      • White Mts
        • White Mountain Peak
F. Hawthorne pers. comm.
  • Wisconsin
    • Sauk Co.
Medaris, L., Fournelle, J. & Henry, D.( 2003) Tourmaline-bearing quartz veins in the Baraboo Quartzite, Wisconsin: occurrence and significance of foitite and oxy-foitite: The Canadian Mineralogist: 41: 749-758.
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