Wayneburnhamite (original) (raw)

A valid IMA mineral species

About WayneburnhamiteHide

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Formula:

Pb9Ca6(Si2O7)3(SiO4)3

previously written as Pb9Ca6(Si2O7)4(SiO4)O

Lustre:

Vitreous, Resinous

Specific Gravity:

5.271 (Calculated)

Name:

Named in honor of C. Wayne Burnham (1922, California, USA – 2015), geochemist and petrologist, Professor at Pennsylvania State University and at Arizona State University. He was awarded the 1998 Roebling Medal, in large part for his work on volatiles in igneous systems.

The Ca (or rather Ca6-) analogue of ganomalite. Apatite polysome.

The only purely Pb-Ca hydrogen- and halogen-devoid silicate mineral. Chemically slightly similar to nasonite. Representative of a very small group of minerals with the _P_-6 space group. The structure of the mineral is determined. The only difference from ganomalite is that the site occupied mainly by Mn in ganomalite is occupied here by Ca.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:47781:9

e94f547a-8b54-48bc-891f-ec3a72c3eb44

IMA Classification of WayneburnhamiteHide

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Type description reference:

Classification of WayneburnhamiteHide

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9.BG.25

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

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 WayneburnhamiteHide

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Pronunciation:

Physical Properties of WayneburnhamiteHide

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Density:

5.271 g/cm3 (Calculated)

Optical Data of WayneburnhamiteHide

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RI values:

_n_ω = 1.855(5) _n_ε = 1.875(5)

δ = 0.020

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

Comments:

sky blue (E) to lighter sky blue (O), E > O

Chemistry of WayneburnhamiteHide

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Mindat Formula:

Pb9Ca6(Si2O7)3(SiO4)3

previously written as Pb9Ca6(Si2O7)4(SiO4)O

Crystallography of WayneburnhamiteHide

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Class (H-M):

6 - Trigonal Dipyramidal

Cell Parameters:

a = 9.8953(9) Å, c = 10.2054(7) Å

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of WayneburnhamiteHide

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General Appearance of Type Material:

hexagonal tablets and prisms, up to 0.5 mm in size

Place of Conservation of Type Material:

Collections of the Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition
Boulevard, Los Angeles, California 90007, USA (catalogue numbers 65639 for holotype and 65640 for cotype specimen)

Geological Setting of Type Material:

metasomatic mineral on fracture surfaces within vesuvianite/wollastonite rock

Associated Minerals at Type Locality:

Reference:

Kampf, A.R., Housley, R.M., Rossman, G.R. (2016): Wayneburnhamite, Pb9Ca6(Si2O7)3(SiO4)3, an apatite polysome – the Mn-free analogue of ganomalite from Crestmore, California. American Mineralogist 101, 2423-2429.

Synonyms of WayneburnhamiteHide

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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 WayneburnhamiteHide

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References for WayneburnhamiteHide

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Localities for WayneburnhamiteHide

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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.