Rhythmite (original) (raw)

Valid as an unnamed mineral

Specific Gravity:

2.736 (Calculated)

Crystal System:

Orthorhombic

Name:

Received its name from B.V. Chesnokov due to a system of thin subparallel strips on its crystals, which are composed of finely dispersed carbon with the admixture of small grains of ‘igumnovite’. The striation is irregular, and its nature is not clear.

A substance of anthropogenic origin (burning coal mine dump). Current IMA regulations do not allow such substances to be approved as valid mineral species.

Forms intergrowths with igumnovite.

‘Rhythmite’ is chemically, structurally, and genetically related to α-Ca3SiO4Cl2 (‘albovite’), with which it also has similar Raman spectra and thermal stability.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:40087:1

2cbff90b-e78f-47b4-9596-811444cb37c8

IMA Classification of RhythmiteHide

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IMA status notes:

Unnamed (probably valid)

Approval history:

Unnamed, but probably valid.

Pronunciation of RhythmiteHide

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Pronunciation:

Physical Properties of RhythmiteHide

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Comment:

Black due to inclusions of graphite

Density:

2.736 g/cm3 (Calculated)

Chemistry of RhythmiteHide

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Mindat Formula:

Ca29(SiO4)8Cl26

Crystallography of RhythmiteHide

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Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

Cell Parameters:

a = 17.0749(6) Å, b = 15.1029(3) Å, c = 13.2907(4) Å

Ratio:

a:b:c = 1.131 : 1 : 0.88

Unit Cell V:

3,427.41 ų (Calculated from Unit Cell)

Synonyms of RhythmiteHide

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Other InformationHide

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Special Storage/
Display Requirements:

It is hygroscopic and becomes damp after prolonged exposure to open air.

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 RhythmiteHide

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References for RhythmiteHide

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Reference List:

Avdontceva, Margarita S., Zolotarev, Andrey A., Brazhnikova, Anastasia S., Bocharov, Vladimir N., Vlasenko, Natalia S., Rassomakhin, Mikhail A., Krivovichev, Sergey V. (2024) ‘Rhythmite’, Ca29(SiO4)8Cl26, an Anthropogenic Phase from the Chelyabinsk Coal Basin (Ural, Russia) with a Complex Modular Structure Related to α-Ca3SiO4Cl2 (‘Albovite’): Crystal Structure, Raman Spectra, and Thermal Expansion. Minerals, 14 (10). doi:10.3390/min14101048

Localities for RhythmiteHide

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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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