Rippite
A valid IMA mineral species
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About Rippite
German S. Ripp
Formula:
K2(Nb,Ti)2(Si4O12)O(O,F)
Colour:
Colorless
Lustre:
Vitreous
Hardness:
4 - 5
Specific Gravity:
3.17
Crystal System:
Tetragonal
Name:
The mineral is named in the honor of German Samuilovich Ripp (Рипп Герман Самуилович) (b. 1935, Ulan-Ude, Buryatia, Russia - 9 March 2024, Ulan-Ude, Buryatia, Russia) from the Institute of Geology, Siberian Branch of RAS. He is a leading expert on carbonatite petrogenesis, including carbonatite magmatic activity in Eastern Siberia, carbonatite mineralogy, geochemistry and stable isotope geochemistry and rare metal mineralization associated with carbonatites.
New structure type
Unique Identifiers
Mindat ID:
47923
Long-form identifier:
mindat:1:1:47923:3
Similar Names
| Lippite | A synonym of Millosevichite | |
| Reppiaite | A valid IMA mineral species | Mn52+(VO4)2(OH)4 |
IMA Classification of Rippite
Approved
IMA Formula:
K2(Nb5+,Ti4+)2(Si4O12)O(O,F)
Approval year:
2016
First published:
2020
Type description reference:
Sharygin, Victor V., Doroshkevich, Anna G., Seryotkin, Yurii V., Karmanov, Nikolai S., Belogub, Elena V., Moroz, Tatyana N., Nigmatulina, Elena N., Yelisseyev, Alexander P., Vedenyapin, Vitalii N., Kupriyanov, Igor N. (2020) Rippite, K2(Nb,Ti)2(Si4O12)O(O,F), a New K-Nb-Cyclosilicate from Chuktukon Carbonatite Massif, Chadobets Upland, Krasnoyarsk Territory, Russia. Minerals, 10 (12) 1102 doi:10.3390/min10121102
Classification of Rippite
9.HA.45
9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
9 : SILICATES (Germanates)
H : Unclassified silicates
A : With Alkali and Alkali-earth Elements
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Rip | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Rippite
Vitreous
Transparency:
Transparent
Colour:
Colorless
Streak:
White
Hardness:
4 - 5 on Mohs scale
Hardness:
VHN50=210 - 487 kg/mm2 - Vickers
Cleavage:
Perfect
very perfect on (001) and perfect to distinct on (100)
very perfect on (001) and perfect to distinct on (100)
Parting:
Not observed
Fracture:
Irregular/Uneven, Step-Like
Density:
3.17(2) g/cm3 (Measured) 3.198 g/cm3 (Calculated)
Optical Data of Rippite
Type:
Uniaxial (+)
RI values:
nω = 1.377 - 1.379 nε = 1.747
Max. Birefringence:
δ = 0.368 - 0.370
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Dispersion:
none
Pleochroism:
Non-pleochroic
Comments:
X = c
Chemistry of Rippite
Mindat Formula:
K2(Nb,Ti)2(Si4O12)O(O,F)
Element Weights:
Crystallography of Rippite
Crystal System:
Tetragonal
Cell Parameters:
a = 8.7388(2) Å, c = 8.1277(2) Å
Ratio:
a:c = 1 : 0.93
Unit Cell V:
620.69 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Prism {100} and pinacoid {001}
Twinning:
None
Comment:
P4bm
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.205 Å | (100) |
| 4.383 Å | (83) |
| 4.082 Å | (90) |
| 3.530 Å | (87) |
| 3.096 Å | (59) |
| 2.985 Å | (81 |
| 2.822 Å | (70) |
| 2.768 Å | (99) |
Reference:
Sharygin, Victor V., Doroshkevich, Anna G., Seryotkin, Yurii V., Karmanov, Nikolai S., Belogub, Elena V., Moroz, Tatyana N., Nigmatulina, Elena N., Yelisseyev, Alexander P., Vedenyapin, Vitalii N., Kupriyanov, Igor N. (2020) Rippite, K2(Nb,Ti)2(Si4O12)O(O,F), a New K-Nb-Cyclosilicate from Chuktukon Carbonatite Massif, Chadobets Upland, Krasnoyarsk Territory, Russia. Minerals, 10 (12) 1102 doi:10.3390/min10121102
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 36 : Carbonatites, kimberlites, and related igneous rocks |
Type Occurrence of Rippite
General Appearance of Type Material:
elongated prismatic crystals (up to 0.5–2 mm)
Place of Conservation of Type Material:
The Central Siberian Geological Museum, V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Rusian Academy of Sciences, Novosibirsk, Russia, catalogue number XIII-347/1
Geological Setting of Type Material:
A primary mineral in calciocarbonatites
Associated Minerals at Type Locality:
Reference:
Sharygin, Victor V., Doroshkevich, Anna G., Seryotkin, Yurii V., Karmanov, Nikolai S., Belogub, Elena V., Moroz, Tatyana N., Nigmatulina, Elena N., Yelisseyev, Alexander P., Vedenyapin, Vitalii N., Kupriyanov, Igor N. (2020) Rippite, K2(Nb,Ti)2(Si4O12)O(O,F), a New K-Nb-Cyclosilicate from Chuktukon Carbonatite Massif, Chadobets Upland, Krasnoyarsk Territory, Russia. Minerals, 10 (12) 1102 doi:10.3390/min10121102
Synonyms of Rippite
Other Language Names for Rippite
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 9.HA. | Shinichengite | Ca5[BSi2O7(OH)2]2 · 6H2O |
| 9.HA. | Kalyuzhnyite-(Ce) | NaKCaSrCeTi(Si8O21)OF(H2O)3 |
| 9.HA. | Moragite | Ca3TiSi2(Al2Si)O14 |
| 9.HA.05 | Ertixiite | Na2Si4O9 |
| 9.HA.10 | Kenyaite | Na2Si22O41(OH)8 · 6H2O |
| 9.HA.20 | Wawayandaite | Ca6Mn2BBe9Si6O23(OH,Cl)15 |
| 9.HA.25 | Magbasite | KBaFe3+Mg7Si8O22(OH)2F6 |
| 9.HA.35 | Demagistrisite | BaCa2Mn3+4(Si3O10)(Si2O7)(OH)4 · 3H2O |
| 9.HA.37 | Donwilhelmsite | CaAl4Si2O11 |
| 9.HA.40 | Kasatkinite | Ba2Ca8B5Si8O32(OH)3 · 6H2O |
| 9.HA.40 | 'Igumnovite' | Ca3Al2[SiO4]2[◻Cl4] |
| 9.HA.42 | Paqueite | Ca3TiSi2(Al,Ti,Si)3O14 |
| 9.HA.42 | Qeltite | Ca3TiSi2(Fe3+2Si)O14 |
| 9.HA.47 | Zagamiite | CaAl2Si3.5O11 |
| 9.HA.50 | Rudenkoite | Sr3(Al3.5Si3.5)O10(OH,O)8Cl2 · H2O |
| 9.HA.50 | 'α-Carnegieite' | NaAlSiO4 |
| 9.HA.52 | 'Atheriastite' | near Ca5MgFeAl6Si8O32 · 5H2O |
| 9.HA.55 | 'Foshallasite' | Ca3[Si2O7] · 3H2O(?) |
| 9.HA.57 | 'Bhreckite' | |
| 9.HA.60 | Nagelschmidtite | Ca7(SiO4)2(PO4)2 |
| 9.HA.65 | Caryochroite | [Na(Sr0.5Ca0.5)Mg]3[Fe3+8Mn(Fe2+0.5◻0.5)]10(Ti2Si12O37)(OH)14(H2O)3 |
| 9.HA.70 | Juanite | Ca10Mg4Al2Si11O39 · 4H2O or near |
| 9.HA.75 | Tacharanite | Ca12Al2Si18O33(OH)36 |
| 9.HA.80 | Oyelite | Ca10Si8B2O29 · 12.5H2O |
| 9.HA.85 | Denisovite | K14+x(Ca,Na,Mn,Fe)48[Si60O162]F16(Ox,OH4-x) · 2H2O |
| 9.HA.90 | Tiettaite | K4Na12Fe3+Si16O41(OH)4 · 2H2O |
Radioactivity
Radioactivity:
| Element | % Content | Activity (Bq/kg) | Radiation Type |
|---|---|---|---|
| Uranium (U) | 0.0000% | 0 | α, β, γ |
| Thorium (Th) | 0.0000% | 0 | α, β, γ |
| Potassium (K) | 13.0253% | 4,038 | β, γ |
For comparison:
- Banana: ~15 Bq per fruit
- Granite: 1,000–3,000 Bq/kg
- EU exemption limit: 10,000 Bq/kg
Note: Risk is shown relative to daily recommended maximum exposure to non-background radiation of 1000 µSv/year. Note that natural background radiation averages around 2400 µSv/year so in reality these risks are probably extremely overstated! With infrequent handling and safe storage natural radioactive minerals do not usually pose much risk.
Interactive Simulator:
Note: The mass selector refers to the mass of radioactive mineral present, not the full specimen, also be aware that the matrix may also be radioactive, possibly more radioactive than this mineral!
Activity: –
| Distance | Dose rate | Risk |
|---|---|---|
| 1 cm | ||
| 10 cm | ||
| 1 m |
The external dose rate (D) from a radioactive mineral is estimated by summing the gamma radiation contributions from its Uranium, Thorium, and Potassium content, disregarding daughter-product which may have a significant effect in some cases (eg 'pitchblende'). This involves multiplying the activity (A, in Bq) of each element by its specific gamma ray constant (Γ), which accounts for its unique gamma emissions. The total unshielded dose at 1 cm is then scaled by the square of the distance (r, in cm) and multiplied by a shielding factor (μshield). This calculation provides a 'worst-case' or 'maximum risk' estimate because it assumes the sample is a point source and entirely neglects any self-shielding where radiation is absorbed within the mineral itself, meaning actual doses will typically be lower. The resulting dose rate (D) is expressed in microsieverts per hour (μSv/h).
D = ((AU × ΓU) + (ATh × ΓTh) + (AK × ΓK)) / r2 × μshield
Fluorescence of Rippite
weak fluorescence
The CL images for single rippite crystals show green color and very complex history
The CL images for single rippite crystals show green color and very complex history
Other Information
Notes:
Not soluble in concentrated HCl and H2SO4
Displays nonlinear optical properties. Under Near-IR laser excitation, it glows (second harmonic generation) green.
Displays nonlinear optical properties. Under Near-IR laser excitation, it glows (second harmonic generation) green.
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 Rippite
mindat.org URL:
https://www.mindat.org/min-47923.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Rippite
Reference List:
Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2016) New minerals and nomenclature modifications approved in 2016, CNMNC Newsletter 32. Mineralogical Magazine, 80 (5) 915-922 doi:10.1180/minmag.2016.080.084
Sharygin, Victor V., Doroshkevich, Anna G., Seryotkin, Yurii V., Karmanov, Nikolai S., Belogub, Elena V., Moroz, Tatyana N., Nigmatulina, Elena N., Yelisseyev, Alexander P., Vedenyapin, Vitalii N., Kupriyanov, Igor N. (2020) Rippite, K2(Nb,Ti)2(Si4O12)O(O,F), a New K-Nb-Cyclosilicate from Chuktukon Carbonatite Massif, Chadobets Upland, Krasnoyarsk Territory, Russia. Minerals, 10 (12) 1102 doi:10.3390/min10121102
Localities for Rippite
Showing 1 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.
Russia (TL) | |
| Sharygin +14 other references |
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Chuktukon carbonatite massif, Chadobets alkaline complex, Boguchansky District, Krasnoyarsk Krai, Russia