Masutomilite
A valid IMA mineral species
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About Masutomilite
Formula:
(K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2
Colour:
Pale purplish-pink
Hardness:
2½
Specific Gravity:
2.90 - 2.94
Crystal System:
Monoclinic
Member of:
Name:
Named in 1977 by Kazuo Harada, Mariko Honda, Kozo Nagashima and Satoshi Kanisawa in honor of Dr. Kazunosuke Masutomi, pharmacist and amateur mineralogist, for his contribution to minerals from Japan.
Unique Identifiers
Mindat ID:
2588
Long-form identifier:
mindat:1:1:2588:7
GUID
(UUID V4):
(UUID V4):
d98e55b2-9fc6-4a72-8567-8a1afcc808b4
IMA Classification of Masutomilite
Approved
IMA Formula:
KLiAlMn2+(Si3Al)O10(F,OH)2
First published:
1976
Classification of Masutomilite
9.EC.20
9 : SILICATES (Germanates)
E : Phyllosilicates
C : Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
9 : SILICATES (Germanates)
E : Phyllosilicates
C : Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
71.2.2b.12
71 : PHYLLOSILICATES Sheets of Six-Membered Rings
2 : Sheets of 6-membered rings with 2:1 layers
71 : PHYLLOSILICATES Sheets of Six-Membered Rings
2 : Sheets of 6-membered rings with 2:1 layers
16.16.11
16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn
16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn
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 |
---|---|---|
Msu | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Msu | Warr (2020) | Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30 |
Physical Properties of Masutomilite
Transparency:
Transparent, Translucent
Colour:
Pale purplish-pink
Hardness:
2½ on Mohs scale
Tenacity:
Flexible
Cleavage:
Perfect
{001}
{001}
Density:
2.90 - 2.94 g/cm3 (Measured) 2.96 g/cm3 (Calculated)
Optical Data of Masutomilite
Type:
Biaxial (-)
RI values:
nα = 1.534 - 1.536 nβ = 1.569 - 1.570 nγ = 1.570 - 1.574
2V:
Measured: 28° to 35°, Calculated: 18°
Max Birefringence:
δ = 0.036 - 0.038
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:
Low
Dispersion:
r > v, very weak.
Optical Extinction:
Y = b; Z ∧ a = 2°-4°.
Pleochroism:
Visible
Comments:
X = Z = colorless to pale pink, Y = purple.
Comments:
Absorption: Y > Z > X.
Chemistry of Masutomilite
Mindat Formula:
(K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2
Common Impurities:
Ti,Fe,Na,Rb,H2O
Crystallography of Masutomilite
Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
B2
Setting:
C2
Cell Parameters:
a = 5.262(2) Å, b = 9.102(3) Å, c = 10.094(3) Å
β = 100.83(2)°
β = 100.83(2)°
Ratio:
a:b:c = 0.578 : 1 : 1.109
Unit Cell V:
474.84 ų (Calculated from Unit Cell)
Z:
2
Crystal Structure
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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) |
---|---|---|---|---|---|---|---|
0004418 | Masutomilite | Brigatti M F, Mottana A, Malferrari D, Cibin G (2007) Crystal structure and chemical composition of Li-, Fe-, and Mn-rich micas American Mineralogist 92 1395-1400 | 2007 | Sawtooth Mountains, Boise county, Idaho, USA | 0 | 293 | |
0014426 | Masutomilite | Mizota T, Kato T, Harada K (1986) The crystal structure of masutomilite, Mn analogue of zinnwaldite Mineralogical Journal 13 13-21 | 1986 | Tanakamiyama, Ohtsu, Japan | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
10.10 Å | (72) |
3.64 Å | (43) |
3.32 Å | (100) |
3.09 Å | (58) |
2.903 Å | (35) |
2.89 Å | (17) |
1.989 Å | (46) |
1.653 Å | (23) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
34 : Complex granite pegmatites |
Type Occurrence of Masutomilite
General Appearance of Type Material:
Zoned mica crystal 10 cm across and 1 cm thick
Place of Conservation of Type Material:
Department of Earth Science, Kanazawa Universitya; Tohoku University, Kawauchi, Japan.
Geological Setting of Type Material:
Granite pegmatite
Associated Minerals at Type Locality:
Reference:
Harada, K., Honda, M., Nagashima, K., Kanisawa, S. (1976) Masutomilite, manganese analog of zinnwaldite, with special reference to masutomilite-lepidolite-zinnwaldite series. Mineralogical Journal (Japan): 8(2): 95-109.
Other Language Names for Masutomilite
Relationship of Masutomilite to other Species
Member of:
Other Members of this group:
Aspidolite | NaMg3(AlSi3O10)(OH)2 | Mon. 2/m : B2/m |
Balestraite | KLi2V5+Si4O12 | Mon. 2 : B2 |
Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 | |
Ephesite | NaLiAl2(Al2Si2O10)(OH)2 | Tric. 1 : P1 |
Garmite | CsLiMg2(Si4O10)F2 | Mon. |
Hendricksite | KZn3(Si3Al)O10(OH)2 | Mon. 2/m : B2/m |
Kreiterite | CsLi2Fe3+(Si4O10)F2 | Mon. |
Lepidolite | A Li-rich mica in, or close to, the so-called Polylithionite-Trilithionite series. | Mon. |
Norrishite | KLiMn3+2(Si4O10)O2 | Mon. 2/m : B2/m |
Orlovite | KLi2Ti(Si4O10)OF | Mon. 2 : B2 |
Polylithionite | KLi2Al(Si4O10)(F,OH)2 | Mon. 2/m : B2/b |
Preiswerkite | NaMg2Al(Al2Si2O10)(OH)2 | Mon. 2/m : B2/b |
Shirokshinite | K(NaMg2)(Si4O10)F2 | Mon. 2/m : B2/m |
Shirozulite | KMn2+3(Si3Al)O10(OH)2 | Mon. 2/m : B2/m |
Sokolovaite | CsLi2Al(Si4O10)F2 | Mon. |
Suhailite | (NH4)Fe2+3(AlSi3O10)(OH)2 | Mon. 2/m : B2/m |
Tainiolite | KLiMg2(Si4O10)F2 | Mon. 2/m : B2/m |
Trilithionite | K(Li1.5Al1.5)(AlSi3O10)(F,OH)2 | Mon. 2/m : B2/b |
Wonesite | (Na,K)(Mg,Fe,Al)6((Al,Si)4O10)2(OH,F)4 | Mon. 2/m : B2/m |
Zinnwaldite | Mica Group. |
Common Associates
Associated Minerals Based on Photo Data:
5 photos of Masutomilite associated with Spessartine | Mn2+3Al2(SiO4)3 |
4 photos of Masutomilite associated with Zinnwaldite | |
3 photos of Masutomilite associated with Lepidolite | |
1 photo of Masutomilite associated with Cleavelandite | Na(AlSi3O8) |
1 photo of Masutomilite associated with Pyromorphite | Pb5(PO4)3Cl |
1 photo of Masutomilite associated with Apatite | Ca5(PO4)3(Cl/F/OH) |
1 photo of Masutomilite associated with Gearksutite | Ca[Al(F,OH)5(H2O)] |
1 photo of Masutomilite associated with Smoky Quartz | SiO2 |
1 photo of Masutomilite associated with Prosopite | CaAl2F4[(OH)4-xFx] |
1 photo of Masutomilite associated with Albite | Na(AlSi3O8) |
Related Minerals - Strunz-mindat Grouping
9.EC. | Balestraite | KLi2V5+Si4O12 |
9.EC. | Meifuite | KFe6(Si7Al)O19(OH)4Cl2 |
9.EC.05 | Minnesotaite | Fe2+3Si4O10(OH)2 |
9.EC.05 | Talc | Mg3Si4O10(OH)2 |
9.EC.05 | Willemseite | Ni3Si4O10(OH)2 |
9.EC.9.EC. | Voloshinite | Rb(LiAl1.5◻0.5)(Al0.5Si3.5)O10F2 |
9.EC.10 | Ferripyrophyllite | Fe3+Si2O5(OH) |
9.EC.10 | Pyrophyllite | Al2Si4O10(OH)2 |
9.EC.10 | Luanshiweiite | KLiAl1.5(Si3.5Al0.5)O10(OH)2 |
9.EC.10 | Fluorluanshiweiite | KLiAl1.5(Si3.5Al0.5)O10F2 |
9.EC.10 | Manganiceladonite | K(MgMn3+◻)(Si4O10)(OH)2 |
9.EC.10 | Garmite | CsLiMg2(Si4O10)F2 |
9.EC.10 | Gorbunovite | CsLi2(Ti,Fe)Si4O10(F,OH,O)2 |
9.EC.15 | Boromuscovite | KAl2(BSi3O10)(OH)2 |
9.EC.15 | Celadonite | K(MgFe3+◻)(Si4O10)(OH)2 |
9.EC.15 | Chernykhite | (Ba,Na)(V3+,Al,Mg)2((Si,Al)4O10)(OH)2 |
9.EC.15 | Montdorite | (K,Na)2(Fe2+,Mn2+,Mg)5(Si4O10)2(OH,F)4 |
9.EC.15 | Muscovite | KAl2(AlSi3O10)(OH)2 |
9.EC.15 | Nanpingite | CsAl2(AlSi3O10)(OH,F)2 |
9.EC.15 | Paragonite | NaAl2(AlSi3O10)(OH)2 |
9.EC.15 | Roscoelite | K(V3+,Al)2(AlSi3O10)(OH)2 |
9.EC.15 | Tobelite | (NH4,K)Al2(AlSi3O10)(OH)2 |
9.EC.15 | Aluminoceladonite | K(MgAl◻)(Si4O10)(OH)2 |
9.EC.15 | Chromphyllite | K(Cr,Al)2(AlSi3O10)(OH,F)2 |
9.EC.15 | Ferroaluminoceladonite | K(Fe2+Al◻)(Si4O10)(OH)2 |
9.EC.15 | Ferroceladonite | K(Fe2+Fe3+◻)(Si4O10)(OH)2 |
9.EC.15 | Chromceladonite | K(MgCr◻)(Si4O10)(OH)2 |
9.EC.15 | Tainiolite | KLiMg2(Si4O10)F2 |
9.EC.15 | Ganterite | (Ba,Na,K)(Al,Mg)2(AlSi3O10)(OH)2 |
9.EC.15 | UM1988-22-SiO:AlCaFFeHKLiMg | KLiMgAl2Si3O10F2 |
9.EC.15 | Kreiterite | CsLi2Fe3+(Si4O10)F2 |
9.EC.20 | Annite | KFe2+3(AlSi3O10)(OH)2 |
9.EC.20 | Ephesite | NaLiAl2(Al2Si2O10)(OH)2 |
9.EC.20 | Hendricksite | KZn3(Si3Al)O10(OH)2 |
9.EC.20 | Norrishite | KLiMn3+2(Si4O10)O2 |
9.EC.20 | Phlogopite | KMg3(AlSi3O10)(OH)2 |
9.EC.20 | Polylithionite | KLi2Al(Si4O10)(F,OH)2 |
9.EC.20 | Preiswerkite | NaMg2Al(Al2Si2O10)(OH)2 |
9.EC.20 | Siderophyllite | KFe2+2Al(Al2Si2O10)(OH)2 |
9.EC.20 | Tetraferriphlogopite | KMg3(Fe3+Si3O10)(OH,F)2 |
9.EC.20 | Fluorotetraferriphlogopite | KMg3(Fe3+Si3O10)F2 |
9.EC.20 | Wonesite | (Na,K)(Mg,Fe,Al)6((Al,Si)4O10)2(OH,F)4 |
9.EC.20 | Eastonite | KMg2Al(Al2Si2O10)(OH)2 |
9.EC.20 | Tetraferriannite | KFe2+3(Si3Fe3+)O10(OH)2 |
9.EC.20 | Trilithionite | K(Li1.5Al1.5)(AlSi3O10)(F,OH)2 |
9.EC.20 | Fluorannite | KFe2+3(Si3Al)O10F2 |
9.EC.20 | Shirokshinite | K(NaMg2)(Si4O10)F2 |
9.EC.20 | Shirozulite | KMn2+3(Si3Al)O10(OH)2 |
9.EC.20 | Sokolovaite | CsLi2Al(Si4O10)F2 |
9.EC.20 | Aspidolite | NaMg3(AlSi3O10)(OH)2 |
9.EC.20 | Fluorophlogopite | KMg3(Si3Al)O10F2 |
9.EC.20 | UM2004-49-SiO:AlCsFHKLi | (Cs,K)(Al,Li)2.6((Si,Al)4O10)(F,OH)2 |
9.EC.20 | Suhailite | (NH4)Fe2+3(AlSi3O10)(OH)2 |
9.EC.20 | Yangzhumingite | KMg2.5(Si4O10)F2 |
9.EC.20 | Orlovite | KLi2Ti(Si4O10)OF |
9.EC.20 | Oxyphlogopite | K(Mg,Ti,Fe)3[(Si,Al)4O10](O,F)2 |
9.EC.20 | Chloroferrokinoshitalite | (Ba,K)(Fe2+,Mg)3(Al2Si2O10)(Cl,OH,F)2 |
9.EC.22 | Pimelite | Ni3Si4O10(OH)2 · 4H2O |
9.EC.30 | Chlorophaeite | (Ca,Mg,Fe)2Fe2Si4O13 · 10H2O |
9.EC.30 | Margarite | CaAl2(Al2Si2O10)(OH)2 |
9.EC.35 | Anandite | (Ba,K)(Fe2+,Mg)3((Si,Al,Fe)4O10)(S,OH)2 |
9.EC.35 | Bityite | CaLiAl2(AlBeSi2O10)(OH)2 |
9.EC.35 | Clintonite | CaAlMg2(SiAl3O10)(OH)2 |
9.EC.35 | Kinoshitalite | (Ba,K)(Mg,Mn2+,Al)3(Al2Si2O10)(OH)2 |
9.EC.35 | Ferrokinoshitalite | (Ba,K)(Fe2+,Mg)3(Al2Si2O10)(OH,F)2 |
9.EC.35 | Oxykinoshitalite | (Ba,K)(Mg,Ti,Fe3+,Fe2+)3((Si,Al)4O10)(O,OH,F)2 |
9.EC.35 | Fluorokinoshitalite | BaMg3(Al2Si2O10)F2 |
9.EC.40 | Beidellite | (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O |
9.EC.40 | Kurumsakite | (Zn,Ni,Cu)8Al8V5+2Si5O35 · 27H2O (?) |
9.EC.40 | Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
9.EC.40 | Nontronite | Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O |
9.EC.40 | Volkonskoite | Ca0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2 · 4H2O |
9.EC.40 | Yakhontovite | (Ca,Na)0.5(Cu,Fe,Mg)2(Si4O10)(OH)2 · 3H2O |
9.EC.45 | Hectorite | Na0.3(Mg,Li)3(Si4O10)(F,OH)2 |
9.EC.45 | Saponite | Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O |
9.EC.45 | Sauconite | Na0.3Zn3((Si,Al)4O10)(OH)2 · 4H2O |
9.EC.45 | Spadaite | MgSiO2(OH)2 · H2O (?) |
9.EC.45 | Stevensite | (Ca,Na)xMg3-x(Si4O10)(OH)2 |
9.EC.45 | Swinefordite | Li(Al,Li,Mg)3((Si,Al)4O10)2(OH,F)4 · nH2O |
9.EC.45 | Zincsilite | Zn3Si4O10(OH)2 · 4H2O (?) |
9.EC.45 | Ferrosaponite | Ca0.3(Fe2+,Mg,Fe3+)3((Si,Al)4O10)(OH)2 · 4H2O |
9.EC.45 | Hanjiangite | Ba2CaV3+Al(H2AlSi3O12)(CO3)2F |
9.EC.50 | Vermiculite | Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O |
9.EC.52 | Tarasovite | near NaKAl11Si13O40(OH)9 · 3H2O |
9.EC.55 | Baileychlore | (Zn,Fe2+,Al,Mg)6(Si,Al)4O10(OH)8 |
9.EC.55 | Chamosite | (Fe2+)5Al(Si,Al)4O10(OH,O)8 |
9.EC.55 | Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
9.EC.55 | Cookeite | (LiAl4◻)[AlSi3O10](OH)8 |
9.EC.55 | Franklinfurnaceite | Ca2Fe3+Mn2+3Mn3+(Zn2Si2O10)(OH)8 |
9.EC.55 | Gonyerite | (Mn2+,Mg)5Fe3+(Fe3+Si3O10)(OH)8 |
9.EC.55 | Nimite | (Ni,Mg,Al)6((Si,Al)4O10)(OH)8 |
9.EC.55 | Orthochamosite | (Fe2+,Mg,Fe3+)5Al(AlSi3O10)(OH,O)8 |
9.EC.55 | Pennantite | Mn2+5Al(AlSi3O10)(OH)8 |
9.EC.55 | Sudoite | Mg2Al3(Si3Al)O10)(OH)8 |
9.EC.55 | Donbassite | Al4.33(Si3Al)O10(OH)8 |
9.EC.55 | Glagolevite | Na(Mg,Al)6(AlSi3O10)(OH,O)8 |
9.EC.55 | Borocookeite | (LiAl4◻)[BSi3O10](OH)8 |
9.EC.60 | Aliettite | Ca0.2Mg6((Si,Al)8O20)(OH)4 · 4H2O |
9.EC.60 | Corrensite | (Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O |
9.EC.60 | Dozyite | Mg7Al2(Al2Si4O15)(OH)12 |
9.EC.60 | Hydrobiotite | K(Mg,Fe2+)6((Si,Al)8O20)(OH)4 · nH2O |
9.EC.60 | Karpinskite | (Ni,Mg)2Si2O5(OH)2 (?) |
9.EC.60 | Kulkeite | Mg8Al(AlSi7O20)(OH)10 |
9.EC.60 | Lunijianlaite | Li0.7Al6.2(AlSi7O20)(OH,O)10 |
9.EC.60 | Rectorite | (Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2O |
9.EC.60 | Saliotite | (Li,Na)Al3(AlSi3O10)(OH)5 |
9.EC.60 | Tosudite | Na0.5(Al,Mg)6((Si,Al)8O18)(OH)12 · 5H2O |
9.EC.60 | Brinrobertsite | Na0.3Al4(Si4O10)2(OH)4 · 3.5 H2O |
9.EC.65 | Macaulayite | (Fe,Al)24Si4O43(OH)2 |
9.EC.70 | Burckhardtite | Pb2(Fe3+Te6+)[AlSi3O8]O6 |
9.EC.75 | Ferrisurite | (Pb,Ca)2.4Fe3+2(Si4O10)(CO3)1.7(OH)3 · nH2O |
9.EC.75 | Surite | (Pb,Ca)3(Al,Fe2+,Mg)2((Si,Al)4O10)(CO3)2(OH)2 |
9.EC.75 | Niksergievite | (Ba,Ca)2Al3(AlSi3O10)(CO3)(OH)6 · nH2O |
9.EC.80 | Kegelite | Pb8Al4(Si8O20)(SO4)2(CO3)4(OH)8 |
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 Masutomilite
mindat.org URL:
https://www.mindat.org/min-2588.html
Please feel free to link to this page.
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References for Masutomilite
Reference List:
Fleischer, Michael, Cabri, Louis J., Nickel, Ernest H., Pabst, Adolf (1977) New Mineral Names. American Mineralogist, 62 (5-6) 593-600
Localities for Masutomilite
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.
Algeria | |
| |
Czech Republic | |
| Scarlett Urbanová (2021) |
| Škoda +2 other references |
| Scarlett Urbanová (2021) |
Japan | |
| Am.Min. 62:594 (1977) +1 other reference |
Harada (1976) | |
| www.mindat.org (n.d.) |
| Yohei Shirose (2017) |
| Nagashima (1975) +2 other references |
Russia | |
| Old data. Confirmed by V.Popov |
| Pavel.M. Kartashov (n.d.) |
| Igor.V. Pekov (2008) |
USA | |
| Schooner (circa 1985) |
| Rocks & Min. 70:246 +8 other references |
| O’Neill et al. (1996) |
Quick NavTopAbout MasutomiliteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence Other LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Mokrusha Mine, Alabashka pegmatite field, Yuzhakovo, Prigorodny District, Sverdlovsk Oblast, Russia