Liset eclogite pod, Liset, Selje, Stad, Vestland, Norwayi
Regional Level Types | |
---|---|
Liset eclogite pod | Outcrop |
Liset | Farm |
Selje | Municipality (Former) |
Stad | Municipality |
Vestland | County |
Norway | Country |
Liset eclogite pod, Liset, Sogn og Fjordane, Norway
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Latitude & Longitude (WGS84):
62° 3' 56'' North , 5° 19' 53'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Clubs:
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Club | Location | Distance |
---|---|---|
Olivin Steinklubb | Fiskå | 13km |
Mindat Locality ID:
14535
Long-form identifier:
mindat:1:2:14535:1
GUID (UUID V4):
3baf0d70-7b5a-473a-bcc8-b622be6389d2
Name(s) in local language(s):
Liset-eklogitten, Liset, Selje kommune, Sogn og Fjordane fylke, Norge
About 60 m long and 30 m wide, a kyanite-eclogite pod in the Western Gneiss region. A type locality for four species. Lisetite and davidsmithite and taramite are found in strongly retrograded clinopyroxene layers in the eclogite pod.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
28 valid minerals. 4 (TL) - type locality of valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
ⓘ Aegirine Formula: NaFe3+Si2O6 Description: often found as corona around quartz |
ⓘ Aegirine-augite Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 |
ⓘ 'Allanite Group' Formula: (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
ⓘ Almandine Formula: Fe2+3Al2(SiO4)3 |
ⓘ 'Apatite' Formula: Ca5(PO4)3(Cl/F/OH) |
ⓘ Barroisite Formula: ◻{CaNa}{Mg3Al2}(AlSi7O22)(OH)2 |
ⓘ 'Chlorite Group' |
ⓘ 'Clinopyroxene Subgroup' |
ⓘ Corundum Formula: Al2O3 |
ⓘ Davidsmithite (TL) Formula: (Ca,◻)2Na6Al8Si8O32 Type Locality: Description: = UM1986-//-SiO:AlCa. Refered to as a "new K-poor, Ca-rich nepheline structure mineral" by Smith & Kechid (1986). |
ⓘ Eastonite Formula: KMg2Al(Al2Si2O10)(OH)2 |
ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
ⓘ Ferro-taramite (TL) Formula: Na(CaNa)(Fe2+3Al2)(Al2Si6O22)(OH)2 Type Locality: |
ⓘ 'Garnet Group' Formula: X3Z2(SiO4)3 |
ⓘ Geikielite Formula: MgTiO3 Description: Mn-rich |
ⓘ Hematite Formula: Fe2O3 |
ⓘ Ilmenite Formula: Fe2+TiO3 |
ⓘ 'Kandite' Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
ⓘ Kyanite Formula: Al2(SiO4)O |
ⓘ Lisetite (TL) Formula: CaNa2Al4Si4O16 Type Locality: Habit: Found in thin sections as clusters of 100 mikron sized grains. They are sorrounded by a characteristic double corona texture. Description: In a strongly retrogressed jadeite-clinopyroxene layer in the Liset eclogite pod.
Lisetite is found in up to 8mm long laths, pseudomorphs after paragonite (?), which consist of irregularly shaped cluster of lisetite in the center surrounded by a white corona of davidsmithite, The laths are surrounded by an almost continuous corona of joined blackish taramite.
|
ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
ⓘ Margarite Formula: CaAl2(Al2Si2O10)(OH)2 |
ⓘ Margarite var. Na-(Mg,Fe)-margarite |
ⓘ 'Monazite' Formula: REE(PO4) |
ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
ⓘ Nybøite Formula: NaNa2(Mg3Al2)(AlSi7O22)(OH)2 Habit: irregular shaped Colour: pink-purple Description: Fe-rich. As inclusions in garnet |
ⓘ Paragonite Formula: NaAl2(AlSi3O10)(OH)2 |
ⓘ 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 |
ⓘ Preiswerkite Formula: NaMg2Al(Al2Si2O10)(OH)2 Description: as symplectite around kyanite. References: |
ⓘ Pyrophanite Formula: Mn2+TiO3 Description: Mg-rich |
ⓘ Quartz Formula: SiO2 |
ⓘ Rutile Formula: TiO2 |
ⓘ Staurolite Formula: Fe2+2Al9Si4O23(OH) |
ⓘ Taramite (TL) Formula: Na(CaNa)(Mg3Al2)(Al2Si6O22)(OH)2 Type Locality: Description: Filling cracks in garnet. References: |
ⓘ Titanite Formula: CaTi(SiO4)O |
ⓘ Zircon Formula: Zr(SiO4) |
ⓘ Zoisite Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 4 - Oxides and Hydroxides | |||
---|---|---|---|
ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
ⓘ | Pyrophanite | 4.CB.05 | Mn2+TiO3 |
ⓘ | Corundum | 4.CB.05 | Al2O3 |
ⓘ | Hematite | 4.CB.05 | Fe2O3 |
ⓘ | Geikielite | 4.CB.05 | MgTiO3 |
ⓘ | Ilmenite | 4.CB.05 | Fe2+TiO3 |
ⓘ | Quartz | 4.DA.05 | SiO2 |
ⓘ | Rutile | 4.DB.05 | TiO2 |
Group 9 - Silicates | |||
ⓘ | Almandine | 9.AD.25 | Fe2+3Al2(SiO4)3 |
ⓘ | Zircon | 9.AD.30 | Zr(SiO4) |
ⓘ | Kyanite | 9.AF.15 | Al2(SiO4)O |
ⓘ | Staurolite | 9.AF.30 | Fe2+2Al9Si4O23(OH) |
ⓘ | Titanite | 9.AG.15 | CaTi(SiO4)O |
ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
ⓘ | Zoisite | 9.BG.10 | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
ⓘ | Aegirine-augite | 9.DA.20 | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 |
ⓘ | Aegirine | 9.DA.25 | NaFe3+Si2O6 |
ⓘ | Taramite (TL) | 9.DE.20 | Na(CaNa)(Mg3Al2)(Al2Si6O22)(OH)2 |
ⓘ | Barroisite | 9.DE.20 | ◻{CaNa}{Mg3Al2}(AlSi7O22)(OH)2 |
ⓘ | Ferro-taramite (TL) | 9.DE.20 | Na(CaNa)(Fe2+3Al2)(Al2Si6O22)(OH)2 |
ⓘ | Nybøite | 9.DE.25 | NaNa2(Mg3Al2)(AlSi7O22)(OH)2 |
ⓘ | Paragonite | 9.EC.15 | NaAl2(AlSi3O10)(OH)2 |
ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
ⓘ | Preiswerkite | 9.EC.20 | NaMg2Al(Al2Si2O10)(OH)2 |
ⓘ | Eastonite | 9.EC.20 | KMg2Al(Al2Si2O10)(OH)2 |
ⓘ | Margarite | 9.EC.30 | CaAl2(Al2Si2O10)(OH)2 |
ⓘ | var. Na-(Mg,Fe)-margarite | 9.EC.30 | CaAl2(Al2Si2O10)(OH)2 |
ⓘ | Davidsmithite (TL) | 9.FA.05 | (Ca,◻)2Na6Al8Si8O32 |
ⓘ | Lisetite (TL) | 9.FA.55 | CaNa2Al4Si4O16 |
Unclassified | |||
ⓘ | 'Monazite' | - | REE(PO4) |
ⓘ | 'Chlorite Group' | - | |
ⓘ | 'Clinopyroxene Subgroup' | - | |
ⓘ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
ⓘ | 'Garnet Group' | - | X3Z2(SiO4)3 |
ⓘ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
ⓘ | 'Kandite' | - | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
ⓘ | 'Allanite Group' | - | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Ferro-taramite | Na(CaNa)(Fe32+Al2)(Al2Si6O22)(OH)2 |
H | ⓘ Barroisite | ◻{CaNa}{Mg3Al2}(AlSi7O22)(OH)2 |
H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
H | ⓘ Margarite | CaAl2(Al2Si2O10)(OH)2 |
H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
H | ⓘ Nybøite | NaNa2(Mg3Al2)(AlSi7O22)(OH)2 |
H | ⓘ Paragonite | NaAl2(AlSi3O10)(OH)2 |
H | ⓘ Preiswerkite | NaMg2Al(Al2Si2O10)(OH)2 |
H | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
H | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
H | ⓘ Taramite | Na(CaNa)(Mg3Al2)(Al2Si6O22)(OH)2 |
H | ⓘ Eastonite | KMg2Al(Al2Si2O10)(OH)2 |
H | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
H | ⓘ Kandite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
H | ⓘ Allanite Group | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
O | Oxygen | |
O | ⓘ Aegirine | NaFe3+Si2O6 |
O | ⓘ Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
O | ⓘ Ferro-taramite | Na(CaNa)(Fe32+Al2)(Al2Si6O22)(OH)2 |
O | ⓘ Almandine | Fe32+Al2(SiO4)3 |
O | ⓘ Barroisite | ◻{CaNa}{Mg3Al2}(AlSi7O22)(OH)2 |
O | ⓘ Corundum | Al2O3 |
O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
O | ⓘ Geikielite | MgTiO3 |
O | ⓘ Hematite | Fe2O3 |
O | ⓘ Ilmenite | Fe2+TiO3 |
O | ⓘ Kyanite | Al2(SiO4)O |
O | ⓘ Lisetite | CaNa2Al4Si4O16 |
O | ⓘ Magnetite | Fe2+Fe23+O4 |
O | ⓘ Margarite | CaAl2(Al2Si2O10)(OH)2 |
O | ⓘ Monazite | REE(PO4) |
O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
O | ⓘ Nybøite | NaNa2(Mg3Al2)(AlSi7O22)(OH)2 |
O | ⓘ Paragonite | NaAl2(AlSi3O10)(OH)2 |
O | ⓘ Preiswerkite | NaMg2Al(Al2Si2O10)(OH)2 |
O | ⓘ Pyrophanite | Mn2+TiO3 |
O | ⓘ Quartz | SiO2 |
O | ⓘ Rutile | TiO2 |
O | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
O | ⓘ Titanite | CaTi(SiO4)O |
O | ⓘ Zircon | Zr(SiO4) |
O | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
O | ⓘ Taramite | Na(CaNa)(Mg3Al2)(Al2Si6O22)(OH)2 |
O | ⓘ Eastonite | KMg2Al(Al2Si2O10)(OH)2 |
O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
O | ⓘ Garnet Group | X3Z2(SiO4)3 |
O | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
O | ⓘ Kandite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
O | ⓘ Allanite Group | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
O | ⓘ Davidsmithite | (Ca,◻)2Na6Al8Si8O32 |
F | Fluorine | |
F | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
Na | Sodium | |
Na | ⓘ Aegirine | NaFe3+Si2O6 |
Na | ⓘ Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
Na | ⓘ Ferro-taramite | Na(CaNa)(Fe32+Al2)(Al2Si6O22)(OH)2 |
Na | ⓘ Barroisite | ◻{CaNa}{Mg3Al2}(AlSi7O22)(OH)2 |
Na | ⓘ Lisetite | CaNa2Al4Si4O16 |
Na | ⓘ Nybøite | NaNa2(Mg3Al2)(AlSi7O22)(OH)2 |
Na | ⓘ Paragonite | NaAl2(AlSi3O10)(OH)2 |
Na | ⓘ Preiswerkite | NaMg2Al(Al2Si2O10)(OH)2 |
Na | ⓘ Taramite | Na(CaNa)(Mg3Al2)(Al2Si6O22)(OH)2 |
Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Na | ⓘ Davidsmithite | (Ca,◻)2Na6Al8Si8O32 |
Mg | Magnesium | |
Mg | ⓘ Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
Mg | ⓘ Barroisite | ◻{CaNa}{Mg3Al2}(AlSi7O22)(OH)2 |
Mg | ⓘ Geikielite | MgTiO3 |
Mg | ⓘ Nybøite | NaNa2(Mg3Al2)(AlSi7O22)(OH)2 |
Mg | ⓘ Preiswerkite | NaMg2Al(Al2Si2O10)(OH)2 |
Mg | ⓘ Taramite | Na(CaNa)(Mg3Al2)(Al2Si6O22)(OH)2 |
Mg | ⓘ Eastonite | KMg2Al(Al2Si2O10)(OH)2 |
Mg | ⓘ Kandite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
Al | Aluminium | |
Al | ⓘ Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
Al | ⓘ Ferro-taramite | Na(CaNa)(Fe32+Al2)(Al2Si6O22)(OH)2 |
Al | ⓘ Almandine | Fe32+Al2(SiO4)3 |
Al | ⓘ Barroisite | ◻{CaNa}{Mg3Al2}(AlSi7O22)(OH)2 |
Al | ⓘ Corundum | Al2O3 |
Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Al | ⓘ Kyanite | Al2(SiO4)O |
Al | ⓘ Lisetite | CaNa2Al4Si4O16 |
Al | ⓘ Margarite | CaAl2(Al2Si2O10)(OH)2 |
Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Al | ⓘ Nybøite | NaNa2(Mg3Al2)(AlSi7O22)(OH)2 |
Al | ⓘ Paragonite | NaAl2(AlSi3O10)(OH)2 |
Al | ⓘ Preiswerkite | NaMg2Al(Al2Si2O10)(OH)2 |
Al | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
Al | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
Al | ⓘ Taramite | Na(CaNa)(Mg3Al2)(Al2Si6O22)(OH)2 |
Al | ⓘ Eastonite | KMg2Al(Al2Si2O10)(OH)2 |
Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Al | ⓘ Kandite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
Al | ⓘ Davidsmithite | (Ca,◻)2Na6Al8Si8O32 |
Si | Silicon | |
Si | ⓘ Aegirine | NaFe3+Si2O6 |
Si | ⓘ Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
Si | ⓘ Ferro-taramite | Na(CaNa)(Fe32+Al2)(Al2Si6O22)(OH)2 |
Si | ⓘ Almandine | Fe32+Al2(SiO4)3 |
Si | ⓘ Barroisite | ◻{CaNa}{Mg3Al2}(AlSi7O22)(OH)2 |
Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Si | ⓘ Kyanite | Al2(SiO4)O |
Si | ⓘ Lisetite | CaNa2Al4Si4O16 |
Si | ⓘ Margarite | CaAl2(Al2Si2O10)(OH)2 |
Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Si | ⓘ Nybøite | NaNa2(Mg3Al2)(AlSi7O22)(OH)2 |
Si | ⓘ Paragonite | NaAl2(AlSi3O10)(OH)2 |
Si | ⓘ Preiswerkite | NaMg2Al(Al2Si2O10)(OH)2 |
Si | ⓘ Quartz | SiO2 |
Si | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
Si | ⓘ Titanite | CaTi(SiO4)O |
Si | ⓘ Zircon | Zr(SiO4) |
Si | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
Si | ⓘ Taramite | Na(CaNa)(Mg3Al2)(Al2Si6O22)(OH)2 |
Si | ⓘ Eastonite | KMg2Al(Al2Si2O10)(OH)2 |
Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Si | ⓘ Garnet Group | X3Z2(SiO4)3 |
Si | ⓘ Kandite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
Si | ⓘ Allanite Group | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
Si | ⓘ Davidsmithite | (Ca,◻)2Na6Al8Si8O32 |
P | Phosphorus | |
P | ⓘ Monazite | REE(PO4) |
P | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
Cl | Chlorine | |
Cl | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
K | Potassium | |
K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
K | ⓘ Eastonite | KMg2Al(Al2Si2O10)(OH)2 |
Ca | Calcium | |
Ca | ⓘ Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
Ca | ⓘ Ferro-taramite | Na(CaNa)(Fe32+Al2)(Al2Si6O22)(OH)2 |
Ca | ⓘ Barroisite | ◻{CaNa}{Mg3Al2}(AlSi7O22)(OH)2 |
Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Ca | ⓘ Lisetite | CaNa2Al4Si4O16 |
Ca | ⓘ Margarite | CaAl2(Al2Si2O10)(OH)2 |
Ca | ⓘ Titanite | CaTi(SiO4)O |
Ca | ⓘ Zoisite | (CaCa)(AlAlAl)O[Si2O7][SiO4](OH) |
Ca | ⓘ Taramite | Na(CaNa)(Mg3Al2)(Al2Si6O22)(OH)2 |
Ca | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
Ca | ⓘ Apatite | Ca5(PO4)3(Cl/F/OH) |
Ca | ⓘ Davidsmithite | (Ca,◻)2Na6Al8Si8O32 |
Ti | Titanium | |
Ti | ⓘ Geikielite | MgTiO3 |
Ti | ⓘ Ilmenite | Fe2+TiO3 |
Ti | ⓘ Pyrophanite | Mn2+TiO3 |
Ti | ⓘ Rutile | TiO2 |
Ti | ⓘ Titanite | CaTi(SiO4)O |
Mn | Manganese | |
Mn | ⓘ Pyrophanite | Mn2+TiO3 |
Mn | ⓘ Kandite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
Fe | Iron | |
Fe | ⓘ Aegirine | NaFe3+Si2O6 |
Fe | ⓘ Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
Fe | ⓘ Ferro-taramite | Na(CaNa)(Fe32+Al2)(Al2Si6O22)(OH)2 |
Fe | ⓘ Almandine | Fe32+Al2(SiO4)3 |
Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Fe | ⓘ Hematite | Fe2O3 |
Fe | ⓘ Ilmenite | Fe2+TiO3 |
Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
Fe | ⓘ Staurolite | Fe22+Al9Si4O23(OH) |
Fe | ⓘ Kandite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
Ni | Nickel | |
Ni | ⓘ Kandite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
Zn | Zinc | |
Zn | ⓘ Kandite | D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn |
Zr | Zirconium | |
Zr | ⓘ Zircon | Zr(SiO4) |
Other Regions, Features and Areas containing this locality
Eurasian PlateTectonic Plate
EuropeContinent
Norway
- ⭔Sogn og FjordaneCounty
- Western Gneiss RegionGeologic Region
ScandinaviaRegion
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References
Smith, David C., Kechid, Sid-Ali, Rossi, Giuseppe (1986) Occurrence and properties of lisetite, CaNa2Al4Si4O16, a new tectosilicate in the system Ca-Na-Al-Si-O. American Mineralogist, 71 (11-12) 1372-1377
Godard, Gaston, Smith, David (1999) Preiswerkite and Na-(Mg,Fe)-margarite in eclogites. Contributions to Mineralogy and Petrology, 136 (1) 20-32 doi:10.1007/s004100050521