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

$Help on X Ray Diffraction:$ 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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Print or Cut-and-Paste your Nanpingite Specimen Label here :

Nanpingite

Cs(Al,Mg,Fe++,Li)2(Si3Al)O10(OH,F)2
Dana No: 71.02.02a.08 Strunz No: 09.EC.15
Locality:

Notes: