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Yoderite

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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.


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Classification of YoderiteHide

Approved
9.AF.25

9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
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
16.19.9

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

Pronounciation of YoderiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of YoderiteHide

Vitreous, Greasy
Transparency:
Transparent
Colour:
Deep purple to dark violet, green (rare)
Hardness:
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

Chemical Properties of YoderiteHide

Formula:
Mg(Al,Fe3+)3(SiO4)2O(OH)
IMA Formula:
(MgAl3)(MgAl)Al2O2(SiO4)4(OH)2
Common Impurities:
Ti,Mn,H2O,P

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

Type Occurrence of YoderiteHide

Other Language Names for YoderiteHide

German:Yoderit
Spanish:Yoderita

Common AssociatesHide

HematiteFe2O3
KyaniteAl2(SiO4)O
QuartzSiO2
TalcMg3Si4O10(OH)2
Associated Minerals Based on Photo Data:
Talc4 photos of Yoderite associated with Talc on mindat.org.
Quartz3 photos of Yoderite associated with Quartz on mindat.org.
Kyanite2 photos of Yoderite associated with Kyanite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.AF.05SillimaniteAl2(SiO4)OOrth. mmm (2/m 2/m 2/m)
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.20Krieselite(Al,Ga)2(GeO4)(OH)2Orth. 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)(F,OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.45AlleghanyiteMn2+5(SiO4)2(OH)2Mon. 2/m : P21/b
9.AF.45Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2Mon. 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.50Humite(Mg,Fe2+)7(SiO4)3(F,OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.50Manganhumite(Mn2+,Mg)7(SiO4)3(OH)2Orth.
9.AF.50Unnamed (Ca-analogue of Humite)Ca7(SiO4)4F2Orth. mmm (2/m 2/m 2/m)
9.AF.55ClinohumiteMg9(SiO4)4F2Mon.
9.AF.55SonoliteMn2+9(SiO4)4(OH)2Mon.
9.AF.55HydroxylclinohumiteMg9(SiO4)4(OH)2Mon. 2/m
9.AF.60LeucophoeniciteMn2+7(SiO4)3(OH)2Mon. 2/m : P21/b
9.AF.65Ribbeite(Mn2+,Mg)5(SiO4)2(OH)2Orth.
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)6Hex.
9.AF.75ÖrebroiteMn2+3(Sb5+,Fe3+)(SiO4)(O,OH)3Hex.
9.AF.75WeliniteMn2+6(W6+,Mg)2(SiO4)2(O,OH)6Trig. 3 : P3
9.AF.80EllenbergeriteMg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10Hex.
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

Related Minerals - Dana Grouping (8th Ed.)Hide

52.2.2b.1AndalusiteAl2(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm
52.2.2b.2KanonaiteMn3+Al(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.19.1IndialiteMg2Al3(AlSi5O18)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
16.19.2Cordierite(Mg,Fe)2Al3(AlSi5O18)Orth. mmm (2/m 2/m 2/m) : Cccm
16.19.3Sekaninaite(Fe,Mg)2Al3(AlSi5O18)Orth.
16.19.4Ferro-gedrite☐{Fe2+2}{Fe2+3Al2}(Al2Si6O22)(OH)2Orth.
16.19.5StauroliteFe2+2Al9Si4O23(OH)Mon. 2/m : B2/m
16.19.6Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2Mon. 2/m : B2/b
16.19.7AmesiteMg2Al(AlSiO5)(OH)4Tric. 1 : P1
16.19.8Corundophilite(Mg,Fe,Al)6(Si,Al)4O10(OH)8
16.19.10Delessite(Mg,Fe,Fe,Al)(Si,Al)4O10(O,OH)8
16.19.11Ferrocarpholite(Fe2+,Mg)Al2(Si2O6)(OH)4Orth. mmm (2/m 2/m 2/m) : Ccca
16.19.12Magnesiocarpholite(Mg,Fe2+)Al2(Si2O6)(OH)4Orth.
16.19.13Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8Mon.
16.19.14Orthochamosite(Fe2+,Mg,Fe3+)5Al(AlSi3O10)(OH,O)8
16.19.15Berthierine(Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4Mon. m : Bm
16.19.16Odinite(Fe,Mg,Al,Fe,Ti,Mn)2.4((Si,Al)2O5)(OH)4Mon. m : Bm
16.19.17ClinochloreMg5Al(AlSi3O10)(OH)8Mon. 2/m : B2/m
16.19.18Gedrite☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2Orth.
16.19.19Magnesiogedrite☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2
16.19.20Diabantite(Mg,Fe,Al)6((Si,Al)4O10)(OH)8
16.19.21SudoiteMg2Al3(Si3Al)O10)(OH)8Mon.
16.19.22VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2OMon. 2/m
16.19.23Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2OOrth.

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.

References for YoderiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mineralogical Magazine (1959): 32: 282.
American Mineralogist (1960): 45: 753.
Higgins, J.B., Ribbe, P.H., and Nakajima, Y. (1982) An ordering model for the commensurate antiphase structure of yoderite. American Mineralogist: 67: 76-84.
T. Fockenberg and W. Schreyer (1991): Yoderite, a mineral with essential ferric iron; its lack of occurrence in the system MgO-Al2O3-SiO2-H2O. American Mineralogist 76, 1052-1060.

Internet Links for YoderiteHide

Localities for YoderiteHide

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Tanzania (TL)
 
  • Dodoma Region
    • Kongwa District
      • Kongwa
American Mineralogist 45, pp. 753 (1960); American Mineralogist 76, pp. 1052-1060 (1991); Mineralogical Magazine 1963 33 : 635-645
Zimbabwe
 
  • Mashonaland West
    • Zambezi Belt
Journal of Metamorphic Geology Volume 16 Issue 6, Pages 809 - 818; Johnson, S. P. And Oliver, G. J. H. (1998), A second natural occurrence of yoderite. Journal of Metamorphic Geology, 16: 809–818
Mineral and/or Locality  
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