Magnesio-foitite
A valid IMA mineral species
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About Magnesio-foitite
Formula:
◻(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Colour:
Pale bluish-grey
Lustre:
Earthy
Hardness:
7
Specific Gravity:
2.995 (Calculated)
Crystal System:
Trigonal
Member of:
Name:
Named for its relationship to foitite.
Type Locality:
Unique Identifiers
Mindat ID:
7162
Long-form identifier:
mindat:1:1:7162:4
GUID
(UUID V4):
(UUID V4):
833b59f3-f370-4bfa-981b-d38822ea66b7
IMA Classification of Magnesio-foitite
Classification of Magnesio-foitite
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
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Mfoi | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Mft | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Magnesio-foitite
Earthy
Colour:
Pale bluish-grey
Streak:
Not reported.
Hardness:
7 on Mohs scale
Tenacity:
Brittle
Density:
2.995 g/cm3 (Calculated)
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
Pleochroism:
Visible
Comments:
O = grey-blue; E = pale lavender.
Comments:
Absorption: Moderate, ω > ε.
Chemistry of Magnesio-foitite
Mindat Formula:
◻(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Crystallography of Magnesio-foitite
Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3m
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
6.366 Å | (60) |
4.984 Å | (30) |
4.211 Å | (90) |
3.969 Å | (100) |
3.470 Å | (60) |
2.949 Å | (70) |
2.567 Å | (100) |
2.037 Å | (50) |
1.913 Å | (40) |
1.587 Å | (30) |
Comments:
Kyonosawa, Japan. The data are from the type description.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4a: Earth’s earliest continental crust | >4.4-3.0 |
19 : Granitic intrusive rocks | |
Near-surface Processes | |
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
26 : Hadean detrital minerals | |
Stage 4b: Highly evolved igneous rocks | >3.0 |
34 : Complex granite pegmatites | |
Stage 5: Initiation of plate tectonics | <3.5-2.5 |
40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Type Occurrence of Magnesio-foitite
General Appearance of Type Material:
Bluish grey individual crystals and felted masses on fracture and void surfaces. Individual crystals average 5 µm wide and 50 µm long (max 15 µm wide and 1 mm long). Also as radial aggregates up to a millimeter across.
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa, Ontario, Canada, number 81566 (type).
Royal Ontario Museum, Toronto, Ontario, Canada, number M47672 (type).
Royal Ontario Museum, Toronto, Ontario, Canada, number M47672 (type).
Geological Setting of Type Material:
From an alteration zone in a silicified porphyry developed in completely altered andesitic to dacitic volcanic rocks. Situated along a shear zone where there is strong acid hydrothermal alteration.
Associated Minerals at Type Locality:
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 |
Alumino-oxy-rossmanite | ◻Al3Al6(Si5AlO18)(BO3)3(OH)3O | Trig. 3m : R3m |
Bosiite | NaFe3+3(Al4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Celleriite | ◻(Mn2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Chromium-dravite | NaMg3Cr3+6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Chromo-alumino-povondraite | NaCr3(Al4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Darrellhenryite | Na(Al2Li)Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Dutrowite | Na(Fe2+2.5Ti0.5)Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Ferro-bosiite | NaFe3+3(Al4Fe2+2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Feruvite | CaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Fluor-buergerite | NaFe3+3Al6(Si6O18)(BO3)3O3F | Trig. 3m : R3m |
Fluor-dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-liddicoatite | Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-rossmanite | ◻(Al2Li)Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m (3 2/m) : R3m |
Fluor-schorl | NaFe2+3Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-tsilaisite | NaMn2+3Al6(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Fluor-uvite | CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3F | Trig. 3m : R3m |
Foitite | ◻(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH) | 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 |
Magnesio-dutrowite | Na(Mg2.5Ti0.5)Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Magnesio-lucchesiite | CaMg3Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Maruyamaite | K(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Olenite | NaAl3Al6(Si6O18)(BO3)3O3(OH) | Trig. 3m : R3m |
Oxy-chromium-dravite | NaCr3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Oxy-dravite | Na(Al2Mg)(Al5Mg)(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 | ◻(Li0.5Al2.5)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 | NaV3(V4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Povondraite | NaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Princivalleite | Na(Mn2Al)Al6(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Rossmanite | ◻(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Schorl | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Tsilaisite | NaMn2+3Al6(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
UM2000-64-SiO:BFeHKMg | (K,Na)Fe3+3(Mg2Fe3+4)Si6O18(BO3)3(OH)3O | |
UM2008-52-SiO:AlBCaFFeHLiMgNa | (Ca,Na,◻)(Al,Li,Fe,Mg)3Al6[Si6O18](BO3)3(OH,O)3(F,O) | |
Unnamed (F analogue of feruvite) | CaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3F | |
Unnamed (Pb-analogue of Fluor-liddicoatite) | Pb(Li2Al)Al6(Si6O18)(BO3)3(OH)3F | |
Uvite | CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH) | Trig. 3m : R3m |
Vanadio-oxy-chromium-dravite | NaV3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Vanadio-oxy-dravite | NaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O | Trig. 3m : R3m |
Common Associates
Associated Minerals Based on Photo Data:
24 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 Beryl | Be3Al2(Si6O18) |
2 photos of Magnesio-foitite associated with Scheelite | Ca(WO4) |
2 photos of Magnesio-foitite associated with Limonite | |
1 photo of Magnesio-foitite associated with Woodhouseite | CaAl3(PO4)(SO4)(OH)6 |
Related Minerals - Strunz-mindat Grouping
9.CK. | Fluor-schorl | NaFe2+3Al6(Si6O18)(BO3)3(OH)3F |
9.CK. | Darrellhenryite | Na(Al2Li)Al6(Si6O18)(BO3)3(OH)3O |
9.CK. | Adachiite | CaFe3Al6(Si5AlO18)(BO3)3(OH)3(OH) |
9.CK. | Bosiite | NaFe3+3(Al4Mg2)(Si6O18)(BO3)3(OH)3O |
9.CK. | Dutrowite | Na(Fe2+2.5Ti0.5)Al6(Si6O18)(BO3)3(OH)3O |
9.CK. | Celleriite | ◻(Mn2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK. | Princivalleite | Na(Mn2Al)Al6(Si6O18)(BO3)3(OH)3O |
9.CK. | Alumino-oxy-rossmanite | ◻Al3Al6(Si5AlO18)(BO3)3(OH)3O |
9.CK. | Ferro-bosiite | NaFe3+3(Al4Fe2+2)(Si6O18)(BO3)3(OH)3O |
9.CK. | Magnesio-dutrowite | Na(Mg2.5Ti0.5)Al6(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Fluor-buergerite | NaFe3+3Al6(Si6O18)(BO3)3O3F |
9.CK.05 | Chromium-dravite | NaMg3Cr3+6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Feruvite | CaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Foitite | ◻(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Liddicoatite | Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Olenite | NaAl3Al6(Si6O18)(BO3)3O3(OH) |
9.CK.05 | Povondraite | NaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Schorl | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Rossmanite | ◻(LiAl2)Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Tsilaisite | NaMn2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Oxy-vanadium-dravite | NaV3(V4Mg2)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Oxy-dravite | Na(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Oxy-rossmanite | ◻(Li0.5Al2.5)Al6(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Luinaite-(OH) | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Fluor-elbaite | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3F |
9.CK.05 | Chromo-alumino-povondraite | NaCr3(Al4Mg2)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Fluor-dravite | NaMg3Al6(Si6O18)(BO3)3(OH)3F |
9.CK.05 | Oxy-schorl | Na(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Fluor-liddicoatite | Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3F |
9.CK.05 | Unnamed (F analogue of feruvite) | CaFe2+3(Al5Mg)(Si6O18)(BO3)3(OH)3F |
9.CK.05 | UM2000-64-SiO:BFeHKMg | (K,Na)Fe3+3(Mg2Fe3+4)Si6O18(BO3)3(OH)3O |
9.CK.05 | Oxy-chromium-dravite | NaCr3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Fluor-tsilaisite | NaMn2+3Al6(Si6O18)(BO3)3(OH)3F |
9.CK.05 | Vanadio-oxy-chromium-dravite | NaV3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Fluor-uvite | CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3F |
9.CK.05 | Vanadio-oxy-dravite | NaV3(Al4Mg2)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Maruyamaite | K(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Lucchesiite | CaFe2+3 Al6(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Oxy-foitite | ◻(Fe2+Al2)Al6(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Oxy-uvite | CaMg3Al6(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Magnesio-lucchesiite | CaMg3Al6(Si6O18)(BO3)3(OH)3O |
9.CK.05 | Uvite | CaMg3(Al5Mg)(Si6O18)(BO3)3(OH)3(OH) |
9.CK.05 | Fluor-rossmanite | ◻(Al2Li)Al6(Si6O18)(BO3)3(OH)3F |
9.CK.10 | Abenakiite-(Ce) | Na26Ce6(Si6O18)(PO4)6(CO3)6(SO2)O |
9.CK.15 | Scawtite | Ca7(Si3O9)2CO3 · 2H2O |
9.CK.20 | Steenstrupine-(Ce) | Na14Mn2+2Fe3+2Ce6Zr(Si6O18)2(PO4)6(PO3OH)(OH)2 · 2H2O |
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.
Internet Links for Magnesio-foitite
mindat.org URL:
https://www.mindat.org/min-7162.html
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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. The Canadian Mineralogist, 37 (6) 1439-1443
Henry, D. J., Novak, M., Hawthorne, F. C., Ertl, A., Dutrow, B. L., Uher, P., Pezzotta, F. (2011) Nomenclature of the tourmaline-supergroup minerals. American Mineralogist, 96 (5) 895-913 doi:10.2138/am.2011.3636
Fantini, C., Tavares, M. C., Krambrock, K., Moreira, R. L., 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 (4) 247-254 doi:10.1007/s00269-013-0642-0
Berryman, E. J., Wunder, B., Ertl, A., Koch-Müller, M., Rhede, D., Scheidl, K., Giester, G., 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 (2) 83-102 doi:10.1007/s00269-015-0776-3
Localities for Magnesio-foitite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Australia | |
| Gigon et al. (2019) |
| Ralph Bottrill et al in prep. +2 other references |
Bottrill et al. (2008) | |
Bottrill et al. (2008) | |
Austria | |
| Ertl et al. (2012) |
Burkina Faso | |
| Fontaine et al. (2017) |
Canada | |
| Reid et al. (2016) |
Rosenberg P. E. (2006) | |
Adlakha et al. (2013) +4 other references | |
Rosenberg P. E. (2006) | |
Chile | |
| Miranda-Díaz et al. (2022) |
China | |
| Pavel.M. Kartashov (n.d.) |
Czech Republic | |
| Gadas et al. (2011) |
| Dolníček et al. (2019) |
| Peter Bačík et al. (2012) |
Germany | |
| Melch (2017) |
Hungary | |
| WDS: Béla Fehér |
Italy | |
| Ciriotti et al. (2011) |
| Fernando Caboni et al. (2024) |
Fernando Caboni et al. (2024) | |
Japan | |
| Uehara et al. (2014) |
| Hawthorne et al. (1999) +1 other reference |
Madagascar | |
| www.minrec.org (2016) |
Russia | |
| Plotinskaya et al. (2014) |
| Nagornaya et al. (2021) |
| I.A. Baksheev and O.E. Kudryavtseva : ... +1 other reference |
Pavel M. Kartashov analytical data (2011) | |
The Canadian Mineralogist | |
| Kuzhuget et al. (2015) |
Kuzhuget et al. (2022) | |
Slovakia | |
| Kozák J. et al. (2017) |
| Juraj ŽItňan (2011) |
| Bačík P. et al. (2015) |
| Uher P. et al. (magnesiofoitite and dravite) |
| Bacík et al. (2011) |
Spain | |
| Calvo Rebollar et al. (2022) |
Turkey | |
| Bozkaya et al. (2014) |
UK | |
| Duchoslav et al. (2017) |
USA | |
| F. Hawthorne pers. comm. |
| Medaris et al. (2003) |
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Kyonosawa, Yamanashi City, Yamanashi Prefecture, Japan