Müllerite (original) (raw)

A valid IMA mineral species

About MülleriteHide

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Formula:

Pb2Fe3+(Te6+O6)Cl

Colour:

Yellow, tending to reddish-orange

Lustre:

Sub-Adamantine, Greasy

Specific Gravity:

5.812 (Calculated)

Name:

Named in honor of Franz-Joseph Müller von Reichenstein (1 July 1740 or 4 October 1742 – 12 October 1825 or 1826, Vienna, Austria-Hungary (now Austria)), mineralogist and mining engineer. During his time in Transylvania he discovered tellurium in 1782.

Co-Type Localities:

ⓘ Aga Mine, Otto Mountain, Baker, Soda Mountains, Silver Lake Mining District, San Bernardino County, California, USA
ⓘ Bird Nest drift, Otto Mountain, Baker, Soda Mountains, Silver Lake Mining District, San Bernardino County, California, USA
ⓘ Bird Nest E3, Otto Mountain, Baker, Soda Mountains, Silver Lake Mining District, San Bernardino County, California, USA

The Fe3+ analogue of backite. Chemically somewhat similar to eztlite. The mineral occurs at various sub-localities of the Otto Mtn.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:54026:7

52de4ef8-e73a-420a-9004-81e18f25167b

IMA Classification of MülleriteHide

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Type description reference:

Mills, Stuart J., Kampf, Anthony R., Momma, Koichi, Housley, Robert M., Marty, Joseph (2020) Müllerite, the Fe-analogue of backite from Otto Mountain, California, USA. The Canadian Mineralogist, 58 (4). 413-419 doi:10.3749/canmin.2000026

Classification of MülleriteHide

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7.BC.47

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
C : With medium-sized and large cations

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 MülleriteHide

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Colour:

Yellow, tending to reddish-orange

Fracture:

Irregular/Uneven

Density:

5.812 g/cm3 (Calculated)

Chemistry of MülleriteHide

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Mindat Formula:

Pb2Fe3+(Te6+O6)Cl

Crystallography of MülleriteHide

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Class (H-M):

32 - Trapezohedral

Cell Parameters:

a = 5.2043(3) Å, c = 8.963(1) Å

Unit Cell V:

210.24 ų (Calculated from Unit Cell)

Morphology:

Hexagonal tablets, thin plates up to 0.2 mm across, intergrown ball-like clusters, flakes. Main forms observed are {100} and {001}.

Comment:

The space group is reported as "P312"

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of MülleriteHide

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Co-Type Localities:

ⓘ Aga Mine, Otto Mountain, Baker, Soda Mountains, Silver Lake Mining District, San Bernardino County, California, USA
ⓘ Bird Nest drift, Otto Mountain, Baker, Soda Mountains, Silver Lake Mining District, San Bernardino County, California, USA
ⓘ Bird Nest E3, Otto Mountain, Baker, Soda Mountains, Silver Lake Mining District, San Bernardino County, California, USA

General Appearance of Type Material:

As hexagonal tablets and thin plates up to 0.2 mm across, intergrown ball-like clusters, and scattered flakes

Place of Conservation of Type Material:

(1) mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, California 90007, USA, catalogue numbers 73609 (SW Cut), 73610 (E3 vein), 73611 (Bird Nest drift) and 73612 (Aga mine); (2) mineralogical collections of the Museums Victoria, GPO Box 666, Melbourne 3001, Victoria, Australia, specimen number M54913 (Aga mine) (cotypes)

Empirical Formula of Type Material:

Pb1.83Ag0.26Fe0.93Al0.03Cu0.02Te6+0.95O5.56Cl1.30I0.14

Reference:

Mills, S. J., Kampf, A. R. Komma, K., Housley, R.M. & Marty, J. (2020) Müllerite, the Fe-analogue of backite from Otto Mountain, California, USA. The Canadian Mineralogist (2020) 58 (4): 413–419

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 MülleriteHide

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References for MülleriteHide

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Reference List:

Mills, Stuart J., Kampf, Anthony R., Momma, Koichi, Housley, Robert M., Marty, Joseph (2020) Müllerite, the Fe-analogue of backite from Otto Mountain, California, USA. The Canadian Mineralogist, 58 (4). 413-419 doi:10.3749/canmin.2000026

Localities for MülleriteHide

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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.

USA
Arizona Cochise County Tombstone Mining District Silver Plume Mine ⓘ Emerald Mine	Marek Chorazewicz (2023)
California San Bernardino County Silver Lake Mining District Soda Mountains Baker Otto Mountain ⓘ Aga Mine (TL)	Miyawaki et al. (2020) +1 other reference
ⓘ Bird Nest drift (TL)	Miyawaki et al. (2020) +1 other reference
ⓘ Bird Nest E3 (TL)	Miyawaki et al. (2020) +1 other reference
ⓘ Library Mine	Miyawaki et al. (2020) +1 other reference
Nevada Lincoln County Delamar Mining District Delamar Mine ⓘ Mine dump	Kampf et al. (2022)