Nanpingite Mineral Data

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.

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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),

Physical Properties of Nanpingite

Cleavage:

[001] Perfect

Color:

White, Silver white.

Density:

3.11

Diaphaniety:

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

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:

r_electron=2.96 gm/cc
note: r_Nanpingite=3.11 gm/cc.

Fermion Index

Fermion Index = 0.01048
Boson Index = 0.98952

Photoelectric:

PE_Nanpingite= 99.89 barns/electron
U=PE_Nanpingite x r_electron= 296.17 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Nanpingite is Not Radioactive

Nanpingite Classification

Dana Class:

71.2.2a.8 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.2)with 2:1 Layers

(71.2.2a)Mica Group (Muscovite subgroup)

71.2.2a.1 Muscovite KAl2(Si3Al)O10(OH,F)2 C 2/m 2/m

71.2.2a.2 Paragonite NaAl2(Si3Al)O10(OH)2 C 2/c,Cc Mono

71.2.2a.3 Chernykhite (Ba,Na)V,Al)2(Si,Al)4O10(OH)2 C 2/c 2/m

71.2.2a.4 Roscoelite K(V,Al,Mg)2AlSi3O10(OH)2 C 2/m 2/m

71.2.2a.5 Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2 C 2/m 2/m

71.2.2a.6 Celadonite K(Mg,Fe)(Fe,Al)[Si4O10](OH)2 C 2/m 2/m

71.2.2a.6b Ferroceladonite! K2FeFeSi8O20(OH)4 C 2/m 2/m

71.2.2a.6c Ferro-aluminoceladonite! K2Fe2Al2Si8O20(OH)4 C 2/m 2/m

71.2.2a.6d Aluminoceladonite! KAl(Mg,Fe)[]Si4O10(OH)2 2/m

71.2.2a.6e Chromceladonite! KCrMg(Si4O10)(OH)2 C 2 2

71.2.2a.7 Tobelite (NH4,K)Al2(Si3Al)O10(OH)2 C 2/m 2/m

71.2.2a.8 Nanpingite Cs(Al,Mg,Fe,Li)2(Si3Al)O10(OH,F)2 C 2/c 2/m

71.2.2a.9 Boromuscovite KAl2(Si3B)O10(OH,F)2 C 2/m 2/m

71.2.2a.10 Montdorite (K,Na)(Fe,Mn,Mg)2.5[Si4O10](F,OH)2 C 2/c 2/m

71.2.2a.11 Chromphyllite! (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2 C 2c 2/m

71.2.2a.12 Shirokshinite! K(NaMg2)Si4O10F2 C 2/m 2/m

Strunz Class:

VIII/H.10-110 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica like layered silicates with [Si4O10]4- and related groups

VIII/H.10 - Mica group, Muscovite series

VIII/H.10-10 Aluminoceladonite! KAl(Mg,Fe)[]Si4O10(OH)2 2/m

VIII/H.10-20 Ferro-aluminoceladonite! K2Fe2Al2Si8O20(OH)4 C 2/m 2/m

VIII/H.10-30 Celadonite K(Mg,Fe)(Fe,Al)[Si4O10](OH)2 C 2/m 2/m

VIII/H.10-35 Chromceladonite! KCrMg(Si4O10)(OH)2 C 2 2

VIII/H.10-40 Ferroceladonite! K2FeFeSi8O20(OH)4 C 2/m 2/m

VIII/H.10-50 Paragonite NaAl2(Si3Al)O10(OH)2 C 2/c,Cc Mono

VIII/H.10-60 Boromuscovite KAl2(Si3B)O10(OH,F)2 C 2/m 2/m

VIII/H.10-70 Muscovite KAl2(Si3Al)O10(OH,F)2 C 2/m 2/m

VIII/H.10-80 Chromphyllite! (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2 C 2c 2/m

VIII/H.10-90 Roscoelite K(V,Al,Mg)2AlSi3O10(OH)2 C 2/m 2/m

VIII/H.10-95 Ganterite! [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2 C 2/c 2/m

VIII/H.10-100 Tobelite (NH4,K)Al2(Si3Al)O10(OH)2 C 2/m 2/m

VIII/H.10-110 Nanpingite Cs(Al,Mg,Fe,Li)2(Si3Al)O10(OH,F)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)

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Nanpingite

Cs(Al,Mg,Fe++,Li)2(Si3Al)O10(OH,F)2
Dana No: 71.2.2a.8 Strunz No: VIII/H.10-110
Locality:

Notes: