Rhythmite
Valid as an unnamed mineral
This page is currently not sponsored. Click here to sponsor this page.
Formula:
Ca29(SiO4)8Cl26
Colour:
Colourless, black
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’), which also has similar Raman spectra and thermal stability.
Forms intergrowths with igumnovite.
‘Rhythmite’ is chemically, structurally, and genetically related to α-Ca3SiO4Cl2 (‘albovite’), which also has similar Raman spectra and thermal stability.
Unique Identifiers
Mindat ID:
40087
Long-form identifier:
mindat:1:1:40087:1
IMA Classification of Rhythmite
IMA status notes:
Unnamed (probably valid)
Approval history:
Unnamed, but probably valid.
Pronunciation of Rhythmite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Rhythmite
Transparency:
Transparent
Colour:
Colourless, black
Comment:
Black due to inclusions of graphite
Density:
2.736 g/cm3 (Calculated)
Chemistry of Rhythmite
Mindat Formula:
Ca29(SiO4)8Cl26
Element Weights:
Elements listed:
Crystallography of Rhythmite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pnma
Setting:
Pnma
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)
Z:
2
Synonyms of Rhythmite
Other Information
Special Storage/
Display Requirements:
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 Rhythmite
mindat.org URL:
https://www.mindat.org/min-40087.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
Mineral Dealers:
References for Rhythmite
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 Rhythmite
Showing 10 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Australia | |
| Li et al. (2022) |
| Salama et al. (2021) |
Brazil | |
| AGP Mining Consultants (2021) |
| de Melo et al. (2019) |
India | |
| Khan et al. (1992) |
Russia | |
| Cesnokov et al. (1998) |
| Pekov (1998) | |
| Avdontceva et al. (2024) | |
South Africa | |
| Smith et al. (2026) |
Tunisia | |
| Somrani et al. (2025) |
