Nybøite Root Name Group
A group of related mineral species
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About Nybøite Root Name Group
Formula:
ANa2(C2+3C3+2)(AlSi7O22)W2
The nybøite minerals are sodium amphiboles defined with A(Na+K+2Ca)> 0.5 apfu and C(Al+Fe3++2Ti) > 1.5 apfu. The individual minerals are defined by their dominant elements in the A, C2+, C3+ and W member.
The root-name mineral, nybøite are defined with Na, Mg, Al and (OH) as the dominant elements. Nybøite minerals with other dominant elements are named with pre-fixes in accordance with the guidelines establised in the 2012 amphibole nomenclature.
The root-name mineral, nybøite are defined with Na, Mg, Al and (OH) as the dominant elements. Nybøite minerals with other dominant elements are named with pre-fixes in accordance with the guidelines establised in the 2012 amphibole nomenclature.
Name:
Nybøite root name originates from the type locality of Nybøite, the Nybø eclogite pod in Western Norway.
This page provides mineralogical data about Nybøite Root Name Group.
Name Encoding
ASCII-7:
Nyboite Root Name Group
Unique Identifiers
Mindat ID:
43501
Long-form identifier:
mindat:1:1:43501:7
Chemistry of Nybøite Root Name Group
Mindat Formula:
ANa2(C2+3C3+2)(AlSi7O22)W2
The nybøite minerals are sodium amphiboles defined with A(Na+K+2Ca)> 0.5 apfu and C(Al+Fe3++2Ti) > 1.5 apfu. The individual minerals are defined by their dominant elements in the A, C2+, C3+ and W member.
The root-name mineral, nybøite are defined with Na, Mg, Al and (OH) as the dominant elements. Nybøite minerals with other dominant elements are named with pre-fixes in accordance with the guidelines establised in the 2012 amphibole nomenclature.
The nybøite minerals are sodium amphiboles defined with A(Na+K+2Ca)> 0.5 apfu and C(Al+Fe3++2Ti) > 1.5 apfu. The individual minerals are defined by their dominant elements in the A, C2+, C3+ and W member.
The root-name mineral, nybøite are defined with Na, Mg, Al and (OH) as the dominant elements. Nybøite minerals with other dominant elements are named with pre-fixes in accordance with the guidelines establised in the 2012 amphibole nomenclature.
Chemical Analysis
Oxide wt%:
| 1 | 2 | 3 | 4 | 5 | |
|---|---|---|---|---|---|
| SiO2 | 53.84 % | 50.89 % | 52.59 % | 45.80 % | 50.15 % |
| TiO2 | 0.16 % | 0.08 % | 0.22 % | 0.50 % | 0.13 % |
| Al2O3 | 12.92 % | 12.09 % | 9.60 % | 3.61 % | |
| MgO | 14.21 % | 12.42 % | 12.72 % | 0.23 % | 12.07 % |
| FeO | 5.03 % | 9.76 % | 5.18 % | 23.45 % | 7.47 % |
| MnO | 0.02 % | 0.07 % | 0.19 % | 2.28 % | 0.09 % |
| NiO | 0.11 % | ||||
| CaO | 2.33 % | 2.93 % | 2.43 % | 0.99 % | 3.03 % |
| Na2O | 9.26 % | 8.42 % | 8.11 % | 8.01 % | 8.4 % |
| K2O | 0.14 % | 0.27 % | 0.00 % | 1.30 % | 0.32 % |
| Cl | 0.01 % | ||||
| Fe2O3 | 7.60 % | 11.74 % | 2.94 % | ||
| H2O | 2.15 % | 1.47 % | |||
| ZnO | 0.12 % | 0.05 % | |||
| F | 0.81 % | 2.58 % | |||
| ?O=F | ?0.34 % | ||||
| Äl2O3 | 12.35 % | ||||
| Cr2O3 | 0.02 % | ||||
| O | 1.09 % | ||||
| Total: | 98.03 % | 96.93 % | 100.79 % | 100.31 % | 100.69 % |
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (Na0.72K0.02)(Na1.67Ca0.33)(Mg1.82Fe2+0.18)(Mg0.32Fe3+0.24Ti0.02Al1.43)(Mg0.8Fe2+0.2) (Si7.24Al0.76)022(OH)2 |
| 4 | (Na0.66K0.27)?0.93(Na1.83Ca0.17)?2.00(Mg0.06Fe2+3.15Mn0.31Zn0.01Fe3+1.38Ti0.06Al0.03)?5.00(Si7.35Al0.65)?8.00O22(OH1.58F0.42)?2.00 |
Sample references:
| ID | Type | Locality | Reference | Notes |
|---|---|---|---|---|
| 1 | Type Specimen | Nybø eclogite pod, Sørpollen, Vågsøy, Kinn, Vestland, Norway | ||
| 2 | Jianchang, Donghai Co., Lianyungang, Jiangsu, China | Sample from porphyroblastic eclogite. | ||
| 3 | Tianpu, Xin Co., Xinyang, Henan, China | Sample from the rim of amphibole grains in a jadeite-bearing granofels .The core of these grains are glaucophane. | ||
| 4 | Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada | The analyses were perfromed on fragments of ferro-ferri-nybøite that were ground with an agate mortar and pestle, placed on a Pb ring (2 mm inner diameter), and secured in place with tape. EMPA was perfromed with a Cameca SX-100 operating in the wavelength-dispersive mode with an excitation voltage of 15 kV, specimen current 10 nA, beam diameter 5 μm, peak-count time 20 s, and background-count time 10 s. The Mössbauer spectrum was acquired in transmission geometry at room temperature using a 57Co(Rh) point source, and the spectrometer was calibrated with the room-temperature spectrum of α-Fe. The spectrum was analyzed in terms of a Voigt-function-based quadrupole-splitting distribution. The XRD powder-diffraction pattern was recorded using a D5000 Bruker powder diffractometer (Ni-filtered CuKα radiation, λ = 1.54178 Å). No internal standard was used. | ||
| 5 | Jianchang, Donghai Co., Lianyungang, Jiangsu, China | Type specimen analysis.58 |
Synonyms of Nybøite Root Name Group
Sodic amphibole (in part)
Relationship of Nybøite Root Name Group to other Species
Other Members of Sodium Amphibole Subgroup:
| Arfvedsonite Root Name Group | ANa2(C2+4Fe3+}Si8O22W2 | Mon. |
| Eckermannite Root Name Group | ANa2(C2+4Al}Si8O22W2 | Mon. |
| Glaucophane Root Name Group | ◻Na2(C2+3Al2)Si8O22W2 | Mon. |
| Leakeite Root Name Group | ANa2(C2+2C3+2Li)(Si8O22)W2 | |
| Riebeckite Root Name Group | ◻Na2(C2+3Fe3+2)(Si8O22)W2 | Mon. |
Nybøite Root Name Group Members:
| 'Ferri-fluoro-nybøite' | NaNa2(Mg3Fe3+2)(AlSi7O22)F2 | |
| 'Ferri-nybøite' | NaNa2(Mg3Fe3+2)(AlSi7O22)(OH)2 | Mon. |
| Ferro-ferri-nybøite | NaNa2(Fe2+3,Mg)Fe3+2)(AlSi7O22)(OH)2 | Mon. 2/m : B2/m |
| 'Ferro-nybøite' | NaNa2(Fe2+3Al2)(AlSi7O22)(OH)2 | Mon. |
| Fluoro-nybøite | NaNa2(Mg3Al2)(AlSi7O22)(F,OH)2 | Mon. 2/m : B2/m |
| Nybøite | NaNa2(Mg3Al2)(AlSi7O22)(OH)2 | Mon. 2/m : B2/m |
Click on any node to view relationships. Formula-derived relationship network for the group members above. Use Find related species to add formula-neighbour species outside the current group view. Solid links show inferred chemical differences; dashed violet links show same-formula crystallographic differences. Hydration states are not treated as relationship changes. These relationships do not imply any real-world substitution reactions between these species.
Other Information
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 Nybøite Root Name Group
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https://www.mindat.org/min-43501.html
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References for Nybøite Root Name Group
Localities for Nybøite Root Name Group
Showing 29 localities.
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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.
Abdong Zr-Nb deposit, Pyonggang County, Kangwon Province, North Korea