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Yoderite

A valid IMA mineral species
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04814760014946350099837.jpg
Yoderite

Mautia Hill, Kongwa, Kongwa District, Dodoma Region, Tanzania
06055090014968540331400.jpg
Yoderite

Mautia Hill, Kongwa, Kongwa District, Dodoma Region, Tanzania
04666500015809463907906.jpg
Yoderite, etc.

Mautia Hill, Kongwa, Kongwa District, Dodoma Region, Tanzania
04814760014946350099837.jpg
Yoderite

Mautia Hill, Kongwa, Kongwa District, Dodoma Region, Tanzania
02744660014957482864679.jpg
Yoderite

Mautia Hill, Kongwa, Kongwa District, Dodoma Region, Tanzania
07935450015397606653916.jpg
Yoderite, etc.

Mautia Hill, Kongwa, Kongwa District, Dodoma Region, Tanzania
04814760014946350099837.jpg
Yoderite

Mautia Hill, Kongwa, Kongwa District, Dodoma Region, Tanzania
06055090014968540331400.jpg
Yoderite

Mautia Hill, Kongwa, Kongwa District, Dodoma Region, Tanzania
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About YoderiteHide

02900010014946541414874.jpg
Hatten S. Yoder, Jr.
Formula:
Mg(Al,Fe3+)3(SiO4)2O(OH)
Colour:
Deep purple to dark violet, green (rare)
Lustre:
Vitreous, Greasy
Hardness:
6
Specific Gravity:
3.39
Crystal System:
Monoclinic
Name:
Named in 1959 by Duncan Mckie in honor of Hatten Schuyler Yoder, Jr. [March 20, 1921 Cleveland, Ohio, USA - August 2, 2003 Bethesda, Maryland, USA], petrologist, Director of the Geophysical Laboratory, Carnegie Institution of Washington (USA).
A major phase in quartz-kyanite-talc schist formed under conditions of ~10 kbar H2O pressure and 800 °C.


Unique IdentifiersHide

Mindat ID:
4363
Long-form identifier:
mindat:1:1:4363:8
GUID
(UUID V4):
4d44bdc5-8b2d-4d73-817f-1b16b5a29c74

IMA Classification of YoderiteHide

Classification of YoderiteHide

Strunz-mindat (2024):
9.AF.25

9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
Dana 8th ed.:
52.2.2b.3

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
2 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Hey's CIM Ref.:
16.19.9

16 : Silicates Containing Aluminum and other Metals
19 : Aluminosilicates of Fe and Mg

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
YodIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Pronunciation of YoderiteHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Physical Properties of YoderiteHide

Lustre:
Vitreous, Greasy
Transparency:
Transparent
Colour:
Deep purple to dark violet, green (rare)
Hardness:
6 on Mohs scale
Cleavage:
Distinct/Good
{001}
Parting:
[001] good
{100} poor
Density:
3.39 g/cm3 (Measured)    3.33 g/cm3 (Calculated)

Optical Data of YoderiteHide

Type:
Biaxial (+)
RI values:
nα = 1.689 - 1.691 nβ = 1.691 - 1.693 nγ = 1.712 - 1.715
2V:
Measured: 25° to 30°, Calculated: 34° to 36°
Max Birefringence:
δ = 0.023 - 0.024
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
weak to moderate
Pleochroism:
Visible
Comments:
Blue - prussian blue, indigo, olive green
Green - Green, pale yellow, yellow
Color - alpha, beta, gamma

Chemistry of YoderiteHide

Mindat Formula:
Mg(Al,Fe3+)3(SiO4)2O(OH)
Elements listed:
Al, Fe, H, Mg, O, Si - search for minerals with similar chemistry
Common Impurities:
Ti,Mn,H2O,P

Chemical AnalysisHide

Oxide wt%:
 12
P2O50.29 %0.37 %
SiO236.56 %36.33 %
TiO20.06 %0.06 %
Al2O343.52 %43.50 %
Ga2O30.01 %0.01 %
V2O30.01 %0.01 %
Cr2O30.01 %0.06 %
Fe2O3*4.95 %4.50 %
FeO*0.44 %0.65 %
MnO0.52 % %
MgO11.90 %12.06 %
SrO0.01 %0.01 %
K2O0.01 % %
F0.01 % %
H2O (by stoichiometry)2.74 %2.73 %
-O=F-0.00 % %
NiO %0.01 %
Na2O %0.01 %
Total:101.04 %100.31 %
Empirical formulas:
Sample IDEmpirical Formula
1(Mg1.93Mn2+0.05Fe2+0.02)(Al5.57Fe3+0.39Fe2+0.03Ti0.01)O2[Si0.99P0.01O4]4(OH)2.00
2(Mg1.96Fe2+0.04)(Al5.59Fe3+0.37Fe2+0.02Ti0.01Cr0.01)O2[Si0.99P0.01O4]4(OH)2.00
Sample references:
IDLocalityReferenceNotes
1Mautia Hill, Kongwa, Kongwa District, Dodoma Region, Tanzania
Frank K. Mazdab collection; sample FKM-69; https://www.rockptx.com/fkm-51-to-fkm-75/#FKM-69
deep indigo/purple yoderite rimming orange kyanite, along with quartz and talc, in classic eclogite-facies "whiteschist" assemblage. EPMA analysis Fe measured as FeO, so Fe3+ calculated from charge balance; H2O calculated by stoichiometry.
2  "  "
Frank K. Mazdab collection; sample FKM-307; https://www.rockptx.com/fkm-301-to-fkm-325/#FKM-307
green yoderite as large patches intergrown within a single large splintery anthophyllite crystal, along with patchy talc. This assemblage differs from the classic kyanite+talc "whiteschist" assemblage, although it presumably experienced similar P-T conditions. EPMA analysis Fe measured as FeO, so Fe3+ calculated by charge balance. H2O calculated by stochiometry.

Crystallography of YoderiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 8.02 Å, b = 5.81 Å, c = 7.25 Å
β = 104.91°
Ratio:
a:b:c = 1.38 : 1 : 1.248
Unit Cell V:
326.45 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Anhedral grains, bladed or lathlike crystals to 12mm

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0000855YoderiteHiggins J B, Ribbe P H, Nakajima Y (1982) An ordering model for the commensurate antiphase structure of yoderite American Mineralogist 67 76-8419820293
0000856YoderiteHiggins J B, Ribbe P H, Nakajima Y (1982) An ordering model for the commensurate antiphase structure of yoderite American Mineralogist 67 76-8419820293
0009274YoderiteFleet S G, Megaw H D (1962) The crystal structure of yoderite Acta Crystallographica 15 721-7281962Mautia Hill, Tanzania0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.50 Å(100)
3.03 Å(80)
2.61 Å(60)
2.00 Å(60)
1.82 Å(60)
3.23 Å(50)
3.19 Å(50)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 5: Initiation of plate tectonics<3.5-2.5
40 : Regional metamorphism (greenschist, amphibolite, granulite facies)
Geological Setting:
Major phase in kyanite-quartz-talc schist ~10 kb water pressure, 800 °C.

Type Occurrence of YoderiteHide

Type Locality:
ⓘ Mautia Hill, Kongwa, Kongwa District, Dodoma Region, Tanzania
Place of Conservation of Type Material:
Geological Survey of Tanzania, JH 2563/2, JH 2563/14; National Museum of Natural History, Washington, D.C., USA, 137854.
Associated Minerals at Type Locality:
TalcQuartzKyaniteHematite
Reference:
McKie D, Radford A J (1959) Yoderite, a new hydrous magnesium iron alumino-silicate from Mautia Hill, Tanganyika. Mineralogical Magazine 32, 282-307

Other Language Names for YoderiteHide

German:Yoderit
Spanish:Yoderita

Common AssociatesHide

Associated Minerals Based on Photo Data:
7 photos of Yoderite associated with TalcMg3Si4O10(OH)2
6 photos of Yoderite associated with KyaniteAl2(SiO4)O
5 photos of Yoderite associated with QuartzSiO2

Related Minerals - Strunz-mindat GroupingHide

9.AF.ChegemiteCa7(SiO4)3(OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.BarwooditeMn2+6Nb5+(SiO4)2O3(OH)3Trig. 3 : P3
9.AF.Jingwenite-(Y)YAlV4+(SiO4)O2(OH)2Mon. 2/m
9.AF.05SillimaniteAl2(SiO4)OOrth. mmm (2/m 2/m 2/m)
9.AF.05XenoliteAl10Si8O31
9.AF.10AndalusiteAl2(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm
9.AF.10KanonaiteMn3+Al(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm
9.AF.15KyaniteAl2(SiO4)OTric. 1 : P1
9.AF.20MulliteAl4+2xSi2-2xO10-xOrth. mmm (2/m 2/m 2/m) : Pbam
9.AF.20KrieseliteAl2(GeO4)F2Orth. mmm (2/m 2/m 2/m) : Pnma
9.AF.23BoromulliteAl9BSi2O19Orth. mm2 : Cmc21
9.AF.30MagnesiostauroliteMg(Mg,Li)3(Al,Mg)18Si8O44(OH)4Mon. 2/m : B2/m
9.AF.30StauroliteFe2+2Al9Si4O23(OH)Mon. 2/m : B2/m
9.AF.30ZincostauroliteZn2Al9Si4O23(OH)Mon. 2/m : B2/m
9.AF.35TopazAl2(SiO4)(F,OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.40NorbergiteMg3(SiO4)F2Orth. mmm (2/m 2/m 2/m)
9.AF.45AlleghanyiteMn2+5(SiO4)2(OH)2Mon. 2/m : P21/b
9.AF.45ChondroditeMg5(SiO4)2F2Mon. 2/m : P21/b
9.AF.45ReinhardbraunsiteCa5(SiO4)2(OH,F)2Mon. 2/m : P21/b
9.AF.45KumtyubeiteCa5(SiO4)2F2Mon. 2/m : P21/b
9.AF.45HydroxylchondroditeMg5(SiO4)2(OH)2Mon. 2/m : P21/b
9.AF.50HumiteMg7(SiO4)3F2Orth. mmm (2/m 2/m 2/m) : Pnma
9.AF.50Manganhumite(Mn2+,Mg)7(SiO4)3(OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.50Unnamed (Ca-analogue of Humite)Ca7(SiO4)4F2Orth. mmm (2/m 2/m 2/m)
9.AF.50FluorchegemiteCa7(SiO4)3F2 Orth. mmm (2/m 2/m 2/m)
9.AF.50Unnamed (OH-analogue of humite)Mg7(SiO4)3(OH)2Orth.
9.AF.55ClinohumiteMg9(SiO4)4F2Mon. 2/m : P21/b
9.AF.55SonoliteMn2+9(SiO4)4(OH)2Mon. 2/m : P21/b
9.AF.55HydroxylclinohumiteMg9(SiO4)4(OH)2Mon. 2/m : P21/b
9.AF.60LeucophoeniciteMn2+7(SiO4)3(OH)2Mon. 2/m : P21/b
9.AF.65RibbeiteMn2+5(SiO4)2(OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.70JerrygibbsiteMn2+9(SiO4)4(OH)2Orth. mmm (2/m 2/m 2/m) : Pbcn
9.AF.75FranciscaniteMn2+6(V5+,◻)2(SiO4)2(O,OH)6Trig. 3 : P3
9.AF.75ÖrebroiteMn2+3(Sb5+,Fe3+)(SiO4)(O,OH)3Trig. 3 : P3
9.AF.75WeliniteMn2+6(W6+,Mg)2(SiO4)2(O,OH)6Trig. 3 : P3
9.AF.75ScorticoiteMn6(Sb,◻)Σ2(SiO4)2O3(OH)3Trig. 3 : P3
9.AF.80EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10Hex. 6 : P63
9.AF.85Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2Mon. 2/m : B2/b
9.AF.85MagnesiochloritoidMgAl2(SiO4)O(OH)2Mon. 2/m : B2/b
9.AF.85Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2Mon.
9.AF.90PoldervaartiteCaCa[SiO3(OH)](OH)Orth. mmm (2/m 2/m 2/m) : Pbca
9.AF.90OlmiiteCaMn2+[SiO3(OH)](OH)Orth. mmm (2/m 2/m 2/m) : Pbca
9.AF.95Pilawite-(Y)Ca2Y2Al4(SiO4)4O2(OH)2Mon. 2/m : P21/b

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.

Internet Links for YoderiteHide

References for YoderiteHide

Localities for YoderiteHide

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 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.
Tanzania (TL)
 
  • Dodoma Region
    • Kongwa District
      • Kongwa
Mineralogical Magazine 1963 33 : 635-645 +2 other references
Zimbabwe
 
  • Mashonaland West
    • Zambezi Belt
Johnson et al. (1998)
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