Yoderite (original) (raw)

A valid IMA mineral species

About YoderiteHide

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Formula:

Mg(Al,Fe3+)3(SiO4)2O(OH)

Colour:

Deep purple to dark violet, green (rare)

Crystal System:

Monoclinic

Name:

Named in 1959 by Duncan Mckie in honour of Hatten Schuyler Yoder, Jr. (20 March 1921, Cleveland, Ohio, USA - 2 August 2003, Bethesda, Maryland, USA), geophysicist and petrologist, 4th Director of the Geophysical Laboratory, Carnegie Institution of Washington (USA) from 1971 to 1986. He conducted pioneering work on minerals under high pressure and temperature. He was noted for his study of silicates and igneous rocks.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:4363:8

4d44bdc5-8b2d-4d73-817f-1b16b5a29c74

IMA Classification of YoderiteHide

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IMA Formula:

(MgAl3)(MgAl)Al2O2(SiO4)4(OH)2

Type description reference:

Classification of YoderiteHide

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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

Mineral SymbolsHide

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

Pronunciation of YoderiteHide

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Pronunciation:

Physical Properties of YoderiteHide

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Colour:

Deep purple to dark violet, green (rare)

Cleavage:

Distinct/Good
{001}

Parting:

[001] good
{100} poor

Density:

3.39 g/cm3 (Measured) 3.33 g/cm3 (Calculated)

Optical Data of YoderiteHide

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RI values:

_n_α = 1.689 - 1.691 _n_β = 1.691 - 1.693 _n_γ = 1.712 - 1.715

2V:

Measured: 25° to 30°, Calculated: 34° to 36°

δ = 0.023 - 0.024

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Dispersion:

weak to moderate

Comments:

Blue - prussian blue, indigo, olive green
Green - Green, pale yellow, yellow
Color - alpha, beta, gamma

Chemistry of YoderiteHide

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Mindat Formula:

Mg(Al,Fe3+)3(SiO4)2O(OH)

Common Impurities:

Ti,Mn,H2O,P

Chemical AnalysisHide

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Empirical formulas:

Sample references:

Crystallography of YoderiteHide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

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)

Morphology:

Anhedral grains, bladed or lathlike crystals to 12mm

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Geological Setting:

Major phase in kyanite-quartz-talc schist ~10 kb water pressure, 800 °C.

Type Occurrence of YoderiteHide

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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:

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

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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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

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References for YoderiteHide

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Localities for YoderiteHide

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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

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- 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.