Yangite (original) (raw)

A valid IMA mineral species

About YangiteHide

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Colour:

Colorless to pale brown (in transmitted light)

Name:

Named in honor of Hexiong Yang, Department of Geosciences, University of Arizona, Tucson, an expert on chain silicates. Also for his involvement with the RRUFF project’s goal to characterize all known minerals chemically, structurally, and spectrographically.

New chain silicate with the two-connected double chains. First chain silicate with two-connected double chains, structurally related to hypothetical triclinic Ca2Si3O8·2H2O phase proposed by Merlino and Bonaccorsi (2008), and thus may be treated as a structural derivative of okenite.

The structure comprises double wollastonite SiO4 tetrahedral chains || [010]; the chains are joined with ribbons of Mn- and Pb-bearing polyhedra.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:43575:2

IMA Classification of YangiteHide

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Type description reference:

Downs, Robert T., Pinch, William W., Thompson, Richard M., Evans, Stanley H., Megaw, Lauren (2016) Yangite, PbMnSi3O8·H2O, a new mineral species with double wollastonite silicate chains, from the Kombat mine, Namibia. American Mineralogist, 101 (11) 2539-2543 doi:10.2138/am-2016-5682

Classification of YangiteHide

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9.EA.52

9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings

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 YangiteHide

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Colour:

Colorless to pale brown (in transmitted light)

Comment:

In transmitted light.

Density:

4.14(3) g/cm3 (Measured) 4.16 g/cm3 (Calculated)

Optical Data of YangiteHide

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RI values:

_n_α = 1.690(1) _n_β = 1.699(1) _n_γ = 1.705(1)

2V:

Measured: 77° (2), Calculated: 78°

δ = 0.015

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

Optical Extinction:

Y = b, Z ∧ c = 11°.

Chemistry of YangiteHide

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Mindat Formula:

PbMnSi3O8 · H2O

Crystallography of YangiteHide

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Class (H-M):

1 - Pinacoidal

Cell Parameters:

a = 9.6015(9) Å, b = 7.2712(7) Å, c = 7.9833(8) Å
α = 105.910(4)°, β = 118.229(4)°, γ = 109.938(5)°

Ratio:

a:b:c = 1.32 : 1 : 1.098

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

From Type Description.

Geological EnvironmentHide

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Type Occurrence of YangiteHide

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General Appearance of Type Material:

Bladed or platy (when broken), elongated along [010].

Place of Conservation of Type Material:

Mineral Museum of the University of Arizona, Tucson, Arizona, USA, catalogue number 19341, and the Smithsonian Institution, Washington DC, USA, catalogue number 175983.

Geological Setting of Type Material:

In an epithermal assemblage, in a sequence of weakly metamorphosed, thin to massive bedded dolostones.

Associated Minerals at Type Locality:

Reference:

Downs, Robert T., Pinch, William W., Thompson, Richard M., Evans, Stanley H., Megaw, Lauren (2016) Yangite, PbMnSi3O8·H2O, a new mineral species with double wollastonite silicate chains, from the Kombat mine, Namibia. American Mineralogist, 101 (11) 2539-2543 doi:10.2138/am-2016-5682

Synonyms of YangiteHide

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Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Notes:

Insoluble in water, acetone, or hydrochloric acid.

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 YangiteHide

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References for YangiteHide

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Reference List:

Downs, Robert T., Pinch, William W., Thompson, Richard M., Evans, Stanley H., Megaw, Lauren (2016) Yangite, PbMnSi3O8·H2O, a new mineral species with double wollastonite silicate chains, from the Kombat mine, Namibia. American Mineralogist, 101 (11) 2539-2543 doi:10.2138/am-2016-5682

Localities for YangiteHide

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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.