Johnsenite-(ce)
Johnsenite-(Ce)
A variety of Minerals
What is Johnsenite-(ce)?
Johnsenite-(Ce) is a very rare mineral of the eudialyte group, with the chemical formula Na12(Ce,La,Sr,Ca,[ ])3Ca6Mn3Zr3WSi(Si9O27)2(Si3O9)2(CO3)O(OH,Cl)2. The original formula was extended to show the presence of both the cyclic silicate groups and silicon at the M4 site, according to the nomenclature of the eudialyte group. It is the third eudialyte-group mineral with essential tungsten (after khomyakovite and manganokhomyakovite), and second with essential rare earth elements (after zirsilite-(Ce), which is the niobium-analogue of johnsenite-(Ce)). In fact, some niobium substitutes for tungsten in johnsenite-(Ce). Other characteristic feature is the presence of essential carbonate group, shared with carbokentbrooksite, golyshevite, mogovidite and zirsilite-(Ce).
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Johnsenite-(ce) before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Johnsenite-(ce) Localities Map
See where Johnsenite-(ce) is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Johnsenite-(ce)
Johnsenite-(Ce) was discovered in alkaline rocks of Mont Saint-Hilaire, Quebec, Canada, which is also a type locality for other eudialyte group species: oneillite, khomyakovite and manganokhomyakovite. The association of johnsenite-(Ce) is rich, as it includes aegirine, albite, amphibole-group mineral, burbankite-group mineral, calcite, catapleiite, cerite-(Ce), dawsonite, epididymite, fluorapophyllite, galena, microcline, molybdenite, natrolite, pectolite, pyrite, pyrrhotite, quartz, rhodochrosite, sphalerite, steacyite, stillwellite-(Ce), titanite, tuperssuatsiaite, zakharovite and zirsilite-(Ce).
Quick Facts
Physical Properties
- Color
- Pale yellow to bright orange
- Hardness (Mohs)
- 5 - 6
- Density
- 3.23 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- Na12Ce3Ca6Mn3Zr3WSi25O73(CO3)(OH)2 Formula from the original paper: Na^12(Ce,La,Sr,Ca,◻)^3Ca^6Mn^3Zr^3W(Si^25O^73)(CO^3)(OH,Cl)^2
- Elements
- C, Ca, Ce, H, Mn, Na, O, Si, W, Zr
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Johnsenite-(ce) FAQs
How do I identify Johnsenite-(ce)?
Johnsenite-(ce) can be identified by its hardness of 5 - 6 on the Mohs scale, Pale yellow to bright orange color. Look for these key characteristics when examining specimens.
What color is Johnsenite-(ce)?
Johnsenite-(ce) typically appears in Pale yellow to bright orange. Color can vary depending on impurities and formation conditions.
How hard is Johnsenite-(ce)?
Johnsenite-(ce) has a hardness of 5 - 6 on the Mohs scale. This gives it moderate hardness.
What is the formation of johnsenite-(ce) of Johnsenite-(ce)?
Johnsenite-(Ce) was discovered in alkaline rocks of Mont Saint-Hilaire, Quebec, Canada, which is also a type locality for other eudialyte group species: oneillite, khomyakovite and manganokhomyakovite. The association of johnsenite-(Ce) is rich, as it includes aegirine, albite, amphibole-group mineral, burbankite-group mineral, calcite, catapleiite, cerite-(Ce), dawsonite, epididymite, fluorapophyllite, galena, microcline, molybdenite, natrolite, pectolite, pyrite, pyrrhotite, quartz, rhodochrosite, sphalerite, steacyite, stillwellite-(Ce), titanite, tuperssuatsiaite, zakharovite and zirsilite-(Ce).
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