Uedaite-(Ce) (original) (raw)

A valid IMA mineral species

About Uedaite-(Ce)Hide

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Formula:

(Mn2+Ce)(AlAlFe2+)O[Si2O7][SiO4](OH)

Colour:

black to dark brown

Specific Gravity:

4.19 (Calculated)

Crystal System:

Monoclinic

Name:

Named in honor of Tateo Ueda (上田健夫) (1912-2000), Japanese crystallographer and professor at Kyoto University, who determined the structure of allanite.

A member of the Allanite Group of the Epidote Supergroup. Mn2+ analogue of Allanite-(Ce).

The composition fits to the unnamed phase 'UM1957-02-SiO:AlFeHMnREE'.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:29545:5

c0cec3ab-979a-42c7-a61b-80417485c68c

IMA Classification of Uedaite-(Ce)Hide

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IMA Formula:

Mn2+CeAl2Fe2+(Si2O7)(SiO4)O(OH)

Type description reference:

Classification of Uedaite-(Ce)Hide

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9.BG.05

9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination

58.2.9.4

58 : SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
2 : Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)

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.

Physical Properties of Uedaite-(Ce)Hide

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Transparency:

Transparent, Translucent

Colour:

Black to dark brown

Cleavage:

Poor/Indistinct
poor on {001}

Fracture:

Irregular/Uneven

Density:

4.19 g/cm3 (Calculated)

Comment:

density unable to be measured because of intergrowth with other minerals

Optical Data of Uedaite-(Ce)Hide

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Comments:

Brown to yellow. Y = b.

Chemistry of Uedaite-(Ce)Hide

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Mindat Formula:

(Mn2+Ce)(AlAlFe2+)O[Si2O7][SiO4](OH)

Chemical AnalysisHide

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Empirical formulas:

Sample references:

Crystallography of Uedaite-(Ce)Hide

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Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 8.939(8) Å, b = 5.742(4) Å, c = 10.187(8) Å
β = 115.10(6)°

Ratio:

a:b:c = 1.557 : 1 : 1.774

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of Uedaite-(Ce)Hide

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General Appearance of Type Material:

Short-prismatic crystals elongated along the
b-axis and less than 1 mm in length.

Place of Conservation of Type Material:

National Museum of Nature and Science, Japan catalog number NSM-M28864

Empirical Formula of Type Material:

Mn0.51Ca0.26Ce0.39Nd0.23La0.11Pr0.07Sm0.05Y0.04Gd0.02Th0.01Al1.89Fe1.34Mg0.01(Si2O7)(SiO4)O0.85(OH)

Reference:

Miyawaki, R., K.Yokoyama, S. Matsubara, Y. Tsutsumi, A. Goto (2008) Uedaite-(Ce), a new member of the epidote group with Mn at the A site, from Shodoshima, Kagawa Prefecture, Japan. European Journal of Mineralogy: 20: 261-269.

Synonyms of Uedaite-(Ce)Hide

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Other Language Names for Uedaite-(Ce)Hide

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Relationship of Uedaite-(Ce) to other SpeciesHide

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Other Members of this group:

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 Uedaite-(Ce)Hide

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References for Uedaite-(Ce)Hide

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Localities for Uedaite-(Ce)Hide

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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.