Mineralogy Database

Yoderite Mineral Data

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General Yoderite Information

Help on Chemical  Formula: Chemical Formula: Mg2(Al,Fe+++)6Si4O18(OH)2
Help on Composition: Composition: Molecular Weight = 656.30 gm
   Magnesium   7.41 %  Mg   12.28 % MgO
   Manganese   0.84 %  Mn    1.20 % Mn2O3
   Aluminum   23.02 %  Al   43.50 % Al2O3
   Iron        2.55 %  Fe    3.65 % Fe2O3
   Silicon    17.12 %  Si   36.62 % SiO2
   Hydrogen    0.31 %  H     2.74 % H2O
   Oxygen     48.76 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg2Al5.6Fe3+0.3Mn3+0.1Si4O18(OH)2
Help on Environment: Environment: A major phase in quartz-kyanite-talc schist formed under conditions of ~10 kbar H2O pressure and 800 deg C.
Help on IMA Status: IMA Status: Approved IMA 1959
Help on Locality: Locality: On Mautia Hill, Kongwa, Central Province, Tanzania. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Hatten Schyuler Yoder, Jr. (1921-), petrologist with the Geophysical Laboratory, Washinton, D. C. USA.
Help on Name Pronunciation: Name Pronunciation: Yoderite Say YODERITE
Help on Synonym: Synonym: ICSD 40123
  PDF 12-625

Yoderite Image

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Comments: Dark bluish-black prismatic yoderite in quartz.
Location: Mautia Hill, Dodoma, Tanzania. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Yoderite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.3812:1:1.2478
Help on Cell Dimensions: Cell Dimensions: a = 7.9933, b = 5.787, c = 7.2213, Z = 1; beta = 104.974° V = 322.69 Den(Calc)= 3.38
Help on Crystal System: Crystal System: Monoclinic - Sphenoidal H-M Symbol (2) Space Group: P 21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.5(1), 3.03(0.8), 2.61(0.6),

Physical Properties of Yoderite

Help on Cleavage: Cleavage: {001} Parting, {100} Parting
Help on Color: Color: Purple red, Deep blue, Emerald green, Yellow.
Help on Density: Density: 3.39
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Yoderite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.043 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2067,KPDmeas= 0.206,KC= 0.2152
Ncalc = 1.73
Help on Optical Data: Optical Data: Biaxial (+), a=1.689-1.691, b=1.691-1.693, g=1.712-1.715, bire=0.0230-0.0240, 2V(Calc)=34-36, 2V(Meas)=25-30.
Help on Pleochroism (x): Pleochroism (x): deep prussian blue or green.
Help on Pleochroism (y): Pleochroism (y): indigo or light yellow.
Help on Pleochroism (z): Pleochroism (z): pale olive green or yellow.

Calculated Properties of Yoderite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.35 gm/cc
note: Specific Gravity of Yoderite =3.38 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEYoderite = 2.46 barns/electron
U=PEYoderite x rElectron Density= 8.24 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Yoderite is Not Radioactive

Yoderite Classification

Help on  Dana Class: Dana Class: 52.02.02b.03 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.02)with cations in [4] and >[4] coordination
  (52.02.02b)AL2SIO5 Andalusite subgroup)
52.02.02b.01 Andalusite Al2SiO5=Al[6]Al[5]OSiO4 Pnnm 2/m 2/m 2/m
52.02.02b.02 Kanonaite (Mn,Al)AlSiO5 Pnnm 2/m 2/m 2/m
52.02.02b.03 Yoderite Mg2(Al,Fe)6Si4O18(OH)2 P 21 2
Help on  Strunz Class: Strunz Class: 09.AF.25 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AF -Nesosilicates with additional anions;
09.AF.25 Yoderite Mg2(Al,Fe)6Si4O18(OH)2 P 21 2

Other Yoderite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Yoderite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: 52.02.02b.03 Strunz No: 09.AF.25





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