Nyboite Mineral Data

General Nyboite Information

Chemical Formula: NaNa2(Mg3Al2)Si7AlO22(OH)2 Composition: Molecular Weight = 826.37 gm    Potassium   0.14 %  K     0.17 % K₂O    Sodium      6.79 %  Na    9.15 % Na₂O    Calcium     1.70 %  Ca    2.38 % CaO    Magnesium   8.79 %  Mg   14.58 % MgO    Titanium    0.12 %  Ti    0.19 % TiO₂    Aluminum    7.02 %  Al   13.26 % Al₂O₃    Iron        4.12 %  Fe    3.56 % FeO /  1.93 % Fe₂O₃    Silicon    24.54 %  Si   52.50 % SiO₂    Nickel      0.07 %  Ni    0.09 % NiO    Hydrogen    0.24 %  H     2.18 % H₂O    Oxygen     46.47 %  O              ______        ______               100.00 %      100.00 % = TOTAL OXIDE Empirical Formula: Na_0.79K_0.03Na_1.65Ca_0.35Mg_2.99Fe²⁺_0.41Fe³⁺_0.2Al_1.37Ti_0.02Ni_0.01Si_7.22Al_0.78O₂₂(OH)₂ Environment: Found in eclogite environments. Ultra-high pressure amphibole mineral. IMA Status: Approved IMA 1981 Locality: Nybo pod, Nordfjord, Norway. Link to MinDat.org Location Data. Name Origin: Named for the locality. Name Pronunciation: Nyboite Synonym: IMA2002-010   Miyashiroite  

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Nyboite Crystallography

Axial Ratios: a:b:c =0.5444:1:0.2987 Cell Dimensions: a = 9.665, b = 17.752, c = 5.303, Z = 2; beta = 104.11° V = 882.40 Den(Calc)= 3.11 Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m X Ray Diffraction: By Intensity(I/I_o): 2.687(1)(151), 10.65(0.6)(110), 3.079(0.55)(310),2.564(0.36)(061), 2.931(0.32)(221), 4.439(0.31)(040), 2.144(0.28)(261), 1.509(0.26)(263), Crystal Structure:

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Raudsepp M , Turnock A C , Hawthorne F C , American Mineralogist , 72 (1987) p.959-964, Characterization of cation ordering in synthetic scandium-fluor-eckermannite,, indium-fluor-eckermannite, and scandium-fluor-nyboite by Rietveld structure, refinement, Sample: FScNY-A3 View Additional jPOWD Structure files for Nyboite [1]

 

Physical Properties of Nyboite

Cleavage: {110} Good, {110} Good Color: Blue, Gray green. Density: 3.12 Diaphaneity: Transparent to Translucent Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals. Habit: Inclusions - Generally found as inclusions in other minerals. Hardness: 6 - Orthoclase Luster: Vitreous (Glassy) Streak: white  

Optical Properties of Nyboite

Gladstone-Dale: CI meas= -0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2122,KPDmeas= 0.2115,KC= 0.2096
Ncalc = 1.65 Optical Data: Biaxial (-), a=1.65, g=1.67, bire=0.0200 Pleochroism (x): colorless. Pleochroism (y): pale brownish pink. Pleochroism (z): pale bluish green.  

Calculated Properties of Nyboite

Electron Density: Bulk Density (Electron Density)=3.10 gm/cc
note: Specific Gravity of Nyboite =3.12 gm/cc.
Fermion Index: Fermion Index = 0.02
Boson Index = 0.98 Photoelectric: PE_Nyboite = 2.93 barns/electron
U=PE_Nyboite x r_electron= 9.08 barns/cc.
Radioactivity:

GRapi = 2.03 (Gamma Ray American Petroleum Institute Units)
Concentration of Nyboite per GRapi unit = 49.23 (%)

Estimated Radioactivity from Nyboite - barely detectable

 

Nyboite Classification

Dana Class: 66.01.03c.11 (66)Inosilicate Double-Width Unbranched Chains, W=2   (66.01)with P=2 amphibole configuration   (66.01.03c)Group 4, the sodic amphiboles  

66.01.03c.01 Glaucophane []Na2(Mg3Al2)Si8O22(OH)2 C 2/m 2/m

 

66.01.03c.02 Ferroglaucophane []Na2(Fe3Al2)Si8O22(OH)2 C 2/m 2/m

 

66.01.03c.03 Crossite? Na2(Mg,Fe)3(Al,Fe)2Si8O22(OH)2 C 2/m 2/m

 

66.01.03c.04 Magnesioriebeckite []Na2[(Mg,Fe)3Fe2]Si8O22(OH)2 C 2/m 2/m

 

66.01.03c.05 Riebeckite []Na2(Fe3Fe2)Si8O22(OH)2 C 2/m 2/m

 

66.01.03c.06 Eckermannite NaNa2(Mg4Al)Si8O22(OH)2 C 2/m 2/m

 

66.01.03c.07 Ferro-eckermannite NaNa2(Fe4Al)Si8O22(OH)2 C 2/m 2/m

 

66.01.03c.08 Magnesio-arfvedsonite NaNa2(Mg4Fe)Si8O22(OH)2 C 2/m 2/m

 

66.01.03c.09 Arfvedsonite NaNa2(Fe4Fe)Si8O22(OH)2 C 2/m 2/m

 

66.01.03c.09a Fluoro-magnesio-arfvedsonite! NaNa2(Mg,Fe)4Fe[Si8O22](F,OH)2 C 2/m 2/m

 

66.01.03c.09b Potassicarfvedsonite! KNa2Fe4FeSi8O22(OH)2 C 2/m 2/m

 

66.01.03c.10 Kozulite NaNa2Mn4(Fe,Al)Si8O22(OH)2 C 2/m 2/m

 

66.01.03c.11 Nyboite NaNa2(Mg3Al2)Si7AlO22(OH)2 C 2/m 2/m

 

66.01.03c.11a Ferronyboite! NaNa2(Fe)3Al2(Si7Al)O22(OH)2 C 2/m 2/m

 

66.01.03c.11b Ferric-ferronyboite! NaNa2(Fe)3(Fe)2(Si7Al)O22(OH)2 C 2/m 2/m

 

66.01.03c.11c Fluoronyboite! NaNa2(Al2Mg3)(Si7Al)O22(F,OH)2 C 2/m 2/m

 

66.01.03c.12 Leakeite NaNa2(Mg2Fe2Li)Si8O22(OH)2 C 2/m 2/m

 

66.01.03c.12a Ferroleakeite! NaNa2(Fe)3(Fe)2Li(Si8O22)(OH)2 C 2/m 2/m

 

66.01.03c.12b Potassicleakeite! KNa2Mg2Fe2LiSi8O22(OH)2 C 2/m 2/m

 

66.01.03c.13 Kornite Na(CaNa)Fe4(Al,Fe)Si7AlO22(OH)2 C 2/m 2/m

 

66.01.03c.14 Ungarettiite NaNa2(Mn2Mn3)Si8O22O2 C 2/m 2/m

 

66.01.03c.15 Fluoro-ferroleakeite NaNa2(Fe2Fe2Li)Si8O22F2 C 2/m 2/m

 

66.01.03c.16 Obertiite! NaNa2(Mg3FeTi)Si8O22(O,F,OH)2 C 2/m 2/m

 

66.01.03c.17 Dellaventuraite! NaNa2(Mg2,Mn,Li,Ti)Si8O22O2 C 2/m 2/m

Strunz Class: 09.DE.25 09 - SILICATES (Germanates)   09.D - Inosilicates* Structural terminology according to Liebau (1985)   09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family  

09.DE.25 Arfvedsonite NaNa2(Fe4Fe)Si8O22(OH)2 C 2/m 2/m

 

09.DE.25 Ferroglaucophane []Na2(Fe3Al2)Si8O22(OH)2 C 2/m 2/m

 

09.DE.25 Crossite? Na2(Mg,Fe)3(Al,Fe)2Si8O22(OH)2 C 2/m 2/m

 

09.DE.25 Eckermannite NaNa2(Mg4Al)Si8O22(OH)2 C 2/m 2/m

 

09.DE.25 Glaucophane []Na2(Mg3Al2)Si8O22(OH)2 C 2/m 2/m

 

09.DE.25 Fluoro-ferroleakeite NaNa2(Fe2Fe2Li)Si8O22F2 C 2/m 2/m

 

09.DE.25 Ferro-eckermannite NaNa2(Fe4Al)Si8O22(OH)2 C 2/m 2/m

 

09.DE.25 Ferroleakeite! NaNa2(Fe)3(Fe)2Li(Si8O22)(OH)2 C 2/m 2/m

 

09.DE.25 Ferronyboite! NaNa2(Fe)3Al2(Si7Al)O22(OH)2 C 2/m 2/m

 

09.DE.25 Ferric-ferronyboite! NaNa2(Fe)3(Fe)2(Si7Al)O22(OH)2 C 2/m 2/m

 

09.DE.25 Obertiite! NaNa2(Mg3FeTi)Si8O22(O,F,OH)2 C 2/m 2/m

 

09.DE.25 Nyboite NaNa2(Mg3Al2)Si7AlO22(OH)2 C 2/m 2/m

 

09.DE.25 Magnesioriebeckite []Na2[(Mg,Fe)3Fe2]Si8O22(OH)2 C 2/m 2/m

 

09.DE.25 Kozulite NaNa2Mn4(Fe,Al)Si8O22(OH)2 C 2/m 2/m

 

09.DE.25 Kornite Na(CaNa)Fe4(Al,Fe)Si7AlO22(OH)2 C 2/m 2/m

 

09.DE.25 Leakeite NaNa2(Mg2Fe2Li)Si8O22(OH)2 C 2/m 2/m

 

09.DE.25 Magnesio-arfvedsonite NaNa2(Mg4Fe)Si8O22(OH)2 C 2/m 2/m

 

09.DE.25 Ungarettiite NaNa2(Mn2Mn3)Si8O22O2 C 2/m 2/m

 

09.DE.25 Riebeckite []Na2(Fe3Fe2)Si8O22(OH)2 C 2/m 2/m

 

09.DE.25 Potassicleakeite! KNa2Mg2Fe2LiSi8O22(OH)2 C 2/m 2/m

 

09.DE.25 Fluoronyboite! NaNa2(Al2Mg3)(Si7Al)O22(F,OH)2 C 2/m 2/m

 

09.DE.25 Fluoro-magnesio-arfvedsonite! NaNa2(Mg,Fe)4Fe[Si8O22](F,OH)2 C 2/m 2/m

 

09.DE.25 Potassicarfvedsonite! KNa2Fe4FeSi8O22(OH)2 C 2/m 2/m

 

09.DE.25 Dellaventuraite! NaNa2(Mg2,Mn,Li,Ti)Si8O22O2 C 2/m 2/m

 

Other Nyboite Information

References: NAME( Dana8) PHYS. PROP.(MinMag, v 64, p 769) OPTIC PROP.(MinMag, v 64, p 769) See Also: Links to other databases for Nyboite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
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