Magnesio-foitite
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About Magnesio-foitite
Formula:
(□,Na)(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Colour:
Pale bluish-grey
Lustre:
Earthy
Hardness:
7
Crystal System:
Trigonal
Member of:
Name:
Named for its relationship to foitite
Type Locality:
Classification of Magnesio-foitite
Approved
Approval Year:
1998
8/E.19-15
9.CK.05
9 : SILICATES (Germanates)
C : Cyclosilicates
K : [Si6O18]12- 6-membered single rings, with insular complex anions
9 : SILICATES (Germanates)
C : Cyclosilicates
K : [Si6O18]12- 6-membered single rings, with insular complex anions
Dana 7th ed.:
61.3.1.2
Physical Properties of Magnesio-foitite
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.
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)
IMA Formula:
◻(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Crystallography of Magnesio-foitite
Crystal System:
Trigonal
Type Occurrence of Magnesio-foitite
Synonyms of Magnesio-foitite
Other Language Names for Magnesio-foitite
Relationship of Magnesio-foitite to other Species
Member of:
Other Members of this group:
Adachiite | CaFe3Al6(Si5AlO18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Bosiite | NaFe3+3(Al4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Chromium-dravite | Na(Mg3)Cr3+6(Si6O18)(BO3)3(OH)3(OH) | Trig. |
Chromo-alumino-povondraite | Na(Cr3)(Al4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Darrellhenryite | Na(LiAl2)Al6(BO3)3Si6O18(OH)3O | Trig. 3m : R3m |
Dravite | Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Feruvite | Ca(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Fluor-buergerite | Na(Fe3+3)Al6(Si6O18)(BO3)3O3F | Trig. 3m : R3m |
Fluor-dravite | Na(Mg3)Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-feruvite | Ca(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3F | |
Fluor-liddicoatite | Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-schorl | Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-tsilaisite | Na(Mn2+)3Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-uvite | CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Foitite | (□,Na)(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OH | Trig. 3m : R3m |
Liddicoatite | Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Lucchesiite | CaFe2+3 Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Luinaite-(OH) | Na(Fe2+)3Al6(Si6O18)(BO3)3(OH)3(OH) | Mon. m : Bm |
Magnesio-lucchesiite | CaMg3Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Maruyamaite | K(MgAl2)(Al5Mg)(BO3)3(Si6O18)(OH)3O | Trig. 3m : R3m |
Olenite | Na(Al3)Al6(Si6O18)(BO3)3O3(OH) | Trig. |
Oxy-chromium-dravite | Na(Cr)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Oxy-dravite | Na(MgAl2)MgAl5(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Oxy-foitite | □(Fe2+Al2)Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m (3 2/m) : R3m |
Oxy-rossmanite | ☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3O | |
Oxy-schorl | Na(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Oxy-uvite | CaMg3Al6(Si6O18)(BO3)3(OH)3O | |
Oxy-vanadium-dravite | Na(V)3(V4Mg2)Si6O18(BO3)3(OH)3O | Trig. 3m : R3m |
Povondraite | NaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O | Trig. |
Rossmanite | ☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Schorl | Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Tsilaisite | Na(Mn2+)3Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
UM2000-64-SiO:BFeHKMg | K, Mg, Fe, Si, B, O, H | |
Unnamed (Pb-dominant Tourmaline) | (Pb,Na)(Li,Al)3Al6(Si6O18)(BO3)3(OH)3(F,OH) | |
Uvite Series | Ca(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH) | Trig. 3m : R3m |
Vanadio-oxy-chromium-dravite | Na(V)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Vanadio-oxy-dravite | NaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m |
Common Associates
Associated Minerals Based on Photo Data:
20 photos of Magnesio-foitite associated with Quartz | SiO2 |
11 photos of Magnesio-foitite associated with Albite | Na(AlSi3O8) |
7 photos of Magnesio-foitite associated with Goshenite | Be3Al2(Si6O18) |
3 photos of Magnesio-foitite associated with Muscovite | KAl2(AlSi3O10)(OH)2 |
2 photos of Magnesio-foitite associated with Scheelite | Ca(WO4) |
2 photos of Magnesio-foitite associated with Limonite | (Fe,O,OH,H2O) |
1 photo of Magnesio-foitite associated with Woodhouseite | CaAl3(PO4)(SO4)(OH)6 |
1 photo of Magnesio-foitite associated with Beryl | Be3Al2(Si6O18) |
Related Minerals - Nickel-Strunz Grouping
9.CK. | Fluor-schorl | Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
9.CK. | Darrellhenryite | Na(LiAl2)Al6(BO3)3Si6O18(OH)3O | Trig. 3m : R3m |
9.CK. | Adachiite | CaFe3Al6(Si5AlO18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
9.CK. | Bosiite | NaFe3+3(Al4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
9.CK.05 | Fluor-buergerite | Na(Fe3+3)Al6(Si6O18)(BO3)3O3F | Trig. 3m : R3m |
9.CK.05 | Chromium-dravite | Na(Mg3)Cr3+6(Si6O18)(BO3)3(OH)3(OH) | Trig. |
9.CK.05 | Dravite | Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
9.CK.05 | Elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
9.CK.05 | Feruvite | Ca(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
9.CK.05 | Foitite | (□,Na)(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OH | Trig. 3m : R3m |
9.CK.05 | Liddicoatite | Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
9.CK.05 | Olenite | Na(Al3)Al6(Si6O18)(BO3)3O3(OH) | Trig. |
9.CK.05 | Povondraite | NaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O | Trig. |
9.CK.05 | Schorl | Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
9.CK.05 | Rossmanite | ☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
9.CK.05 | Tsilaisite | Na(Mn2+)3Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
9.CK.05 | Oxy-vanadium-dravite | Na(V)3(V4Mg2)Si6O18(BO3)3(OH)3O | Trig. 3m : R3m |
9.CK.05 | Oxy-dravite | Na(MgAl2)MgAl5(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
9.CK.05 | Oxy-rossmanite | ☐(LiAl2)Al6(Si6O18)(BO3)3(OH)3O | |
9.CK.05 | Luinaite-(OH) | Na(Fe2+)3Al6(Si6O18)(BO3)3(OH)3(OH) | Mon. m : Bm |
9.CK.05 | Fluor-elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
9.CK.05 | Chromo-alumino-povondraite | Na(Cr3)(Al4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
9.CK.05 | Fluor-dravite | Na(Mg3)Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
9.CK.05 | Oxy-schorl | Na(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
9.CK.05 | Fluor-liddicoatite | Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
9.CK.05 | Oxy-chromium-dravite | Na(Cr)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
9.CK.05 | Fluor-tsilaisite | Na(Mn2+)3Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
9.CK.05 | Vanadio-oxy-chromium-dravite | Na(V)3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
9.CK.05 | Uvite (OH-dominant end-member) | Ca(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
9.CK.05 | Fluor-uvite | CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
9.CK.05 | Vanadio-oxy-dravite | NaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m |
9.CK.10 | Abenakiite-(Ce) | Na26Ce6(Si6O18)(PO4)6(CO3)6(SO2)O | Trig. 3 : R3 |
9.CK.15 | Scawtite | Ca7(Si3O9)2CO3 · 2H2O | Mon. 2/m |
9.CK.20 | Steenstrupine-(Ce) | Na14Mn2+2(Fe3+,Mn3+)2Ce6(Zr,Th)(Si6O18)2(PO4)6(HPO4)(OH)2 · 2H2O | Trig. |
9.CK.20 | Thorosteenstrupine | (Ca,Th,Mn)3Si4O11F · 6H2O |
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:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.
Fantini, C., Tavares, M.C., Krambrock, K., Moreira, R.L., and Righi, A. (2014): Raman and infrared study of hydroxyl sites in natural uvite, fluor-uvite, magnesio-foitite, dravite and elbaite tourmalines. Physics and Chemistry of Minerals, 41, 247-254.
Berryman, E.J., Wunder, B., Ertl, A., Koch-Müller, M., Rhede, D., Scheidl, K., Giester, G., and Heinrich, W. (2016): Influence of the X-site composition on tourmaline’s crystal structure: investigation of synthetic K-dravite, dravite, oxy-uvite, and magnesio-foitite using SREF and Raman spectroscopy. Physics and Chemistry of Minerals, 43, 83-102.
Internet Links for Magnesio-foitite
mindat.org URL:
https://www.mindat.org/min-7162.html
Please feel free to link to this page.
Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Magnesio-foitite
Locality List




All localities listed without proper references should be considered as questionable.
Australia | |
| Gigon, J., Skirrow, R. G., Harlaux, M., Richard, A., Mercadier, J., Annesley, I. R., & Villeneuve, J. (2019). Insights into B-Mg-Metasomatism at the Ranger U Deposit (NT, Australia) and Comparison with Canadian Unconformity-Related U Deposits. Minerals, 9(7), 432. |
| Ralph Bottrill et al in prep.; Bottrill, R. S. (2000). A Mineralogical Field Guide for the Western Tasmania Minerals and Museums Tour. |
Bottrill & Baker (in prep) Catalogue of minerals of Tasmania | |
Bottrill RS & Baker, WE (in prep) Catalogue of Minerals of Tasmania. Mineral Resources Tasmania | |
Austria | |
| Ertl, A., Schuster, R., Hughes, J.M., Ludwig, T., Meyer, H.-P., Finger, F., Dyar, M.D., Ruschel, K., Rossman, G.R., Klötzli, U., Brandstätter, F., Lengauer, C.L., Tillmanns, E. (2012): Li-bearing tourmalines in Variscan granitic pegmatites from the Moldanubian nappes, Lower Austria. European Journal of Mineralogy, 24, 695-715. |
Burkina Faso | |
| Fontaine, A., Eglinger, A., Ada, K., André-Mayer, A. S., Reisberg, L., Siebenaller, L., ... & Poujol, M. (2017). Geology of the world-class Kiaka polyphase gold deposit, West African Craton, Burkina Faso. Journal of African Earth Sciences, 126, 96-122. |
Canada | |
| Reid, K.D., Creighton, S. & Potter, E.G. (2016) Composition of large zoned aluminum phosphate sulfate minerals: implications for fluid evolution in the Centennial uranium deposit area, Athabasca basin, Saskatchewan, Canada. Canadian Mineralogist 54, 1205-1228. |
Rosenberg P. E., Foit F. F. (2006): Magnesiofoitite from the uranium deposits of the Athabasca basin, Saskatchewan, Canada. Canadian Mineralogist, 44, 959-965. | |
Geological Association of Canada (2014) Abstracts Fredericton Vol 37; Adlakha, E.E. & Hattori, K. (2016): Paragenesis and composition of tourmaline types along the P2 fault and Mcarthur River uranium deposit, Athabasca Basin, Canada. Canadian Mineralogist, 54, 661-679.; Adlakha, E., Hattori, K., Zaluski, G., Kotzer, T., & Potter, E. G. (2013). Alteration within the basement rocks associated with the P2 fault and the McArthur River uranium deposit, Athabasca Basin. Geological Survey of Canada Open File Report, 7462, 33.; Ng, R., Alexandre, P., & Kyser, K. (2013). Mineralogical and geochemical evolution of the unconformity-related McArthur River Zone 4 orebody in the Athabasca Basin, Canada: implications of a silicified zone. Economic Geology, 108(7), 1657-1689.; Adlakha, E. E., & Hattori, K. (2015). Compositional variation and timing of aluminum phosphate-sulfate minerals in the basement rocks along the P2 fault and in association with the McArthur River uranium deposit, Athabasca Basin, Saskatchewan, Canada. American Mineralogist, 100(7), 1386-1399. | |
Rosenberg P. E., Foit F. F. (2006): Magnesiofoitite from the uranium deposits of the Athabasca basin, Saskatchewan, Canada. Canadian Mineralogist, 44, 959-965. | |
China | |
| Pavel Kartashov data |
Czech Republic | |
| Gadas, P., Novák, M., Filip, J., & Staněk, J. (2011). Zoned foitite→ schorl→ dravite→ magnesiofoitite crystals from pockets in anatectic pegmatites of the Moldanubian Zone, Czech Republic. In Asociacion Geologica Argentina, ser. D, Contributions to the 5th Int. Symp. on Granitic Pegmatites (Vol. 14, pp. 87-89). |
Germany | |
| Melch, R. (2017): Magnesiofoitit aus dem Bayerischen Wald. Lapis, 42 (3), 25. |
Hungary | |
| WDS: Béla Fehér |
Italy | |
| Ciriotti, M.E. & Biagioni, C. (2011): Pot-pourri 2011: identificazioni di minerali di interesse. Micro, 3/2011, 125-133 |
Japan | |
| Uehara, S., et al (2014) Minerals from Kyushu and Yamaguchi. (Fukuouka Mineral Club, 355 pp.) |
| [AmMin 85:1562] |
Madagascar | |
| http://www.minrec.org/pdfs/Toms%20Online%20report%2038.pdf |
Russia | |
| Plotinskaya, O. Y., Grabezhev, A. I., Groznova, E. O., Seltmann, R., & Lehmann, B. (2014). The Late Paleozoic porphyry–epithermal spectrum of the Birgilda–Tomino ore cluster in the South Urals, Russia. Journal of Asian Earth Sciences, 79, 910-931. |
| 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. | |
| Kuzhuget, R. V., Zaikov, V. V., Lebedev, V. I., & Mongush, A. A. (2015). Gold mineralization of the Khaak-Sair gold-quartz ore occurrence in listwanites (western Tuva). Russian Geology and Geophysics, 56(9), 1332-1348. |
Slovakia | |
| Juraj ŽItňan, Peter Koděra & Pavel Uher (2011) Characteristics of advanced argillic alteration at Biely Vrch and Kalinka localities, Javorie stratovolcano, Slovakia.SGA Student Conference Mineral resources for the society Prague, April15 19,2011 |
| Bačík P., Ertl A., Števko M., Giester G., Sečkár P. (2015): Acicular zoned tourmaline (magnesio-foitite to foitite) from a quartz vein near Tisovec, Slovakia: the relationship between crystal chemistry and acicular habit. Canadian Mineralogist, 53, 2, 221-234. |
| 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. |
Turkey | |
| Bozkaya, G., HanilçI, N., Baksheev, I. A., Prokofiev, V. Yu. and Banks, D. A. (2014), Tourmaline Composition of the Kışladaĝ Au Deposit, Uşak, Turkey. Acta Geologica Sinica, 88: 520–521 |
USA | |
| F. Hawthorne pers. comm. |
| 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. |
Kyonosawa, Mitomi-mura, Yamanashi, Japan