Nanpingite Mineral Data

General Nanpingite Information

Chemical Formula: Cs(Al,Mg,Fe++,Li)2(Si3Al)O10(OH,F)2 Composition: Molecular Weight = 487.97 gm    Cesium     24.51 %  Cs   25.99 % Cs₂O    Lithium     0.28 %  Li    0.61 % Li₂O    Magnesium   1.00 %  Mg    1.65 % MgO    Aluminum   13.27 %  Al   25.07 % Al₂O₃    Iron        2.29 %  Fe    2.94 % FeO    Silicon    18.42 %  Si   39.40 % SiO₂    Hydrogen    0.37 %  H     3.32 % H₂O    Oxygen     38.69 %  O    Fluorine    1.17 %  F     1.17 % F                 -   %   F    -0.49 % -O=F₂                  ______        ______               100.00 %       99.67 % = TOTAL OXIDE Empirical Formula: Cs_0.9Al_1.6Mg_0.2Fe²⁺_0.2Li_0.2Si_3.2Al_0.8O₁₀(OH)_1.8F_0.3 Environment: Veinlets in a pollucite-rich middle zone of a muscovite-albite-spodumene pegmatite. IMA Status: Approved IMA 1990 Locality: Nanping area, Fukien Province, China. Link to MinDat.org Location Data. Name Origin: Named for the locality. Name Pronunciation: Nanpingite + Pronunciation  

Nanpingite Image

Images:

Nanpingite   Lepidolite Comments: Hexagonal tabular crystals of pearly colourless lepidolite within massive white pollucite from unknown rare metal pegmatite. Nanpingite forms the outer zones of these lepidolite crystals (~30-150 µm). Location: China. Scale: Specimen size is 3.5x3x2 cm. © Pavel M. Kartashov

Nanpingite Crystallography

Axial Ratios: a:b:c =0.6051:1:2.4176 Cell Dimensions: a = 5.362, b = 8.86, c = 21.42, Z = 4; beta = 95.77° V = 1,012.45 Den(Calc)= 3.20 Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c X Ray Diffraction: By Intensity(I/I_o): 2.664(1), 2.129(0.85), 2.122(0.16), Crystal Structure:

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Ni Y , Hughes J M , American Mineralogist , 81 (1996) p.105-110, The crystal structure of nanpingite-2M2, the Cs end-member of muscovite

 

Physical Properties of Nanpingite

Cleavage: {001} Perfect Color: White, Silver white. Density: 3.11 Diaphaneity: Transparent to Translucent Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals. Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals. Habit: Pseudo Hexagonal - Crystals show a hexagonal outline. Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) Hardness: 2.5-3 - Finger Nail-Calcite Luster: Vitreous - Pearly Streak: white  

Optical Properties of Nanpingite

Gladstone-Dale: CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1795,KPDmeas= 0.1847,KC= 0.1874
Ncalc = 1.58 - 1.6 Optical Data: Biaxial (-), a=1.551, b=1.584, g=1.588, bire=0.0370, 2V(Calc)=36, 2V(Meas)=46. Dispersion r > v weak.  

Calculated Properties of Nanpingite

Electron Density: Bulk Density (Electron Density)=2.96 gm/cc
note: Specific Gravity of Nanpingite =3.11 gm/cc.
Fermion Index: Fermion Index = 0.01
Boson Index = 0.99 Photoelectric: PE_Nanpingite = 99.89 barns/electron
U=PE_Nanpingite x rElectron Density= 296.17 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nanpingite is Not Radioactive  

Nanpingite Classification

Dana Class: 71.02.02a.08 (71)Phyllosilicate Sheets of Six-Membered Rings   (71.02)with 2:1 Layers   (71.02.02a)Mica Group (Muscovite subgroup)  

71.02.02a.01 Muscovite KAl2(Si3Al)O10(OH,F)2 C 2/m 2/m

 

71.02.02a.02 Paragonite NaAl2(Si3Al)O10(OH)2 C 2/c,Cc Mono

 

71.02.02a.03 Chernykhite (Ba,Na)V,Al)2(Si,Al)4O10(OH)2 C 2/c 2/m

 

71.02.02a.04 Roscoelite K(V,Al,Mg)2AlSi3O10(OH)2 C 2/m 2/m

 

71.02.02a.05 Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2 C 2/m 2/m

 

71.02.02a.06 Celadonite K(Mg,Fe)(Fe,Al)[Si4O10](OH)2 C 2/m 2/m

 

71.02.02a.06b Ferroceladonite! K2FeFeSi8O20(OH)4 C 2/m 2/m

 

71.02.02a.06c Ferroaluminoceladonite! K2Fe2Al2Si8O20(OH)4 C 2/m 2/m

 

71.02.02a.06d Aluminoceladonite! KAl(Mg,Fe)[]Si4O10(OH)2 2/m

 

71.02.02a.06e Chromceladonite! KCrMg(Si4O10)(OH)2 C 2 2

 

71.02.02a.07 Tobelite (NH4,K)Al2(Si3Al)O10(OH)2 C 2/m 2/m

 

71.02.02a.08 Nanpingite Cs(Al,Mg,Fe,Li)2(Si3Al)O10(OH,F)2 C 2/c 2/m

 

71.02.02a.09 Boromuscovite KAl2(Si3B)O10(OH,F)2 C 2/m 2/m

 

71.02.02a.10 Montdorite (K,Na)(Fe,Mn,Mg)2.5[Si4O10](F,OH)2 C 2/c 2/m

 

71.02.02a.11 Chromphyllite! (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2 C 2c 2/m

 

71.02.02a.12 Shirokshinite! K(NaMg2)Si4O10F2 C 2/m 2/m

Strunz Class: 09.EC.15 09 - SILICATES (Germanates)   09.E - Phyllosilicates   09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets  

09.EC.15 Boromuscovite KAl2(Si3B)O10(OH,F)2 C 2/m 2/m

 

09.EC.15 Celadonite K(Mg,Fe)(Fe,Al)[Si4O10](OH)2 C 2/m 2/m

 

09.EC.15 Chernykhite (Ba,Na)V,Al)2(Si,Al)4O10(OH)2 C 2/c 2/m

 

09.EC.15 Chromphyllite! (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2 C 2c 2/m

 

09.EC.15 Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2 C 2/m 2/m

 

09.EC.15 Aluminoceladonite! KAl(Mg,Fe)[]Si4O10(OH)2 2/m

 

09.EC.15 Ferroaluminoceladonite! K2Fe2Al2Si8O20(OH)4 C 2/m 2/m

 

09.EC.15 Ferroceladonite! K2FeFeSi8O20(OH)4 C 2/m 2/m

 

09.EC.15 Montdorite (K,Na)(Fe,Mn,Mg)2.5[Si4O10](F,OH)2 C 2/c 2/m

 

09.EC.15 Nanpingite Cs(Al,Mg,Fe,Li)2(Si3Al)O10(OH,F)2 C 2/c 2/m

 

09.EC.15 Tobelite (NH4,K)Al2(Si3Al)O10(OH)2 C 2/m 2/m

 

09.EC.15 Roscoelite K(V,Al,Mg)2AlSi3O10(OH)2 C 2/m 2/m

 

09.EC.15 Muscovite KAl2(Si3Al)O10(OH,F)2 C 2/m 2/m

 

09.EC.15 Paragonite NaAl2(Si3Al)O10(OH)2 C 2/c,Cc Mono

 

09.EC.15 Tainiolite KLiMg2Si4O10F2 C 2/m 2/m

 

09.EC.15 Chromceladonite! KCrMg(Si4O10)(OH)2 C 2 2

 

09.EC.15 Ganterite! [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2 C 2/c 2/m

 

Other Nanpingite Information

References: NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.75,p709,1990) OPTIC PROP.(Am.Min.,Vol.75,p709,1990) See Also: Links to other databases for Nanpingite :
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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