Fluoro-sodic-pedrizite Mineral Data

General Fluoro-sodic-pedrizite Information

Chemical Formula:

NaLi2(Mg2Al2Li)S5Si8O22F2

Composition:

Molecular Weight = 777.04 gm

Potassium 0.05 % K 0.06 % K₂O

Sodium 1.98 % Na 2.67 % Na₂O

Lithium 2.30 % Li 4.94 % Li₂O

Calcium 0.21 % Ca 0.29 % CaO

Magnesium 5.69 % Mg 9.44 % MgO

Manganese 0.14 % Mn 0.18 % MnO

Aluminum 7.01 % Al 13.25 % Al₂O₃

Zinc 0.08 % Zn 0.10 % ZnO

Chromium 0.07 % Cr 0.10 % Cr₂O₃

Iron 3.74 % Fe 4.81 % FeO

Silicon 28.77 % Si 61.55 % SiO₂

Hydrogen 0.12 % H 1.04 % H₂O

Oxygen 47.15 % O

Fluorine 2.69 % F 2.69 % F

- % F -1.13 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na_0.64K_0.01Li_1.93Ca_0.04Na_0.03Mg_1.69Fe²⁺_0.31Al_1.98Cr_0.01Zn_0.01Li_0.64Fe²⁺_0.21Mg_0.13 Mn²⁺_0.02Si_3.96Al_0.04Si₄O₂₂F_1.1(OH)_0.9

Environment:

Occurs at the inner contact with lithium pegmatite around oligoclase andesite. Amphibole group.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Tastyg spodumene deposit, Tuva, Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named as per current IMA amphibole nomenclature (Burke and Leake 2004; Can. Mineral., 42, 1881-1883). Clinoholmquistite discredited.

Synonym:

Clinoholmquistite

IMA2004-002

Fluoro-sodic-pedrizite Image

Images:

Clinoholmquistite Magnesioclinoholmquistite Fluoro-sodic-pedrizite

Comments: Dark blue fibrous clinoholmquistite with radiating structure, variety magnesioclinoholmquistite. Clinoholmsquitite may be a new aphibole, fluoro-sodic-pedrizite..
Location: Near Murun, Republic of Sakha, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Fluoro-sodic-pedrizite Crystallography

Axial Ratios:

a:b:c =0.5317:1:0.2992

Cell Dimensions:

a = 9.368, b = 17.616, c = 5.271, Z = 2; beta = 102.38° V = 849.63 Den(Calc)= 3.04

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.675(1), 3.002(0.66), 8.11(0.56),4.39(0.54), 3.371(0.43), 2.869(0.26),

Physical Properties of Fluoro-sodic-pedrizite

Cleavage:

{110} Perfect, {110} Perfect

Color:

Pale blue.

Density:

Diaphaneity:

Transparent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

5-6 - Between Apatite and Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Fluoro-sodic-pedrizite

Gladstone-Dale:

CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.205,KPDmeas= 0.2078,KC= 0.21
Ncalc = 1.63 - 1.64

Optical Data:

Biaxial (-), a=1.61, b=1.627, g=1.633, bire=0.0230

Calculated Properties of Fluoro-sodic-pedrizite

Electron Density:

Bulk Density (Electron Density)=2.97 gm/cc
note: Specific Gravity of Fluoro-sodic-pedrizite =3.00 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Fluoro-sodic-pedrizite}= 2.72 barns/electron
U=PE_{Fluoro-sodic-pedrizite} x r_electron= 8.08 barns/cc.

Radioactivity:

GRapi = 0.71 (Gamma Ray American Petroleum Institute Units)
Concentration of Fluoro-sodic-pedrizite per GRapi unit =141.59 (%)

Estimated Radioactivity from Fluoro-sodic-pedrizite - barely detectable

Fluoro-sodic-pedrizite Classification

Dana Class:

66.01.01.09c (66)Inosilicate Double-Width Unbranched Chains, W=2

(66.01)with P=2 amphibole configuration

(66.01.01)Group 1, the Mg-Fe-Mn-Li amphiboles (Monoclinic)

66.01.01.01 Magnesiocummingtonite (Mg,Fe)7Si8O22(OH)2 C 2/m 2/m

66.01.01.02 Cummingtonite []Mg7Si8O22(OH)2 C 2/m 2/m

66.01.01.03 Grunerite []Fe7Si8O22(OH)2 C 2/m 2/m

66.01.01.03b Permanganogrunerite! []Mn4(Fe)3(Si8O22)(OH)2 C 2/m 2/m

66.01.01.04 Manganocummingtonite Na(Na,Mn)2(Mg4,Fe)5Si8O22(OH)2 C 2/m 2/m

66.01.01.05 Manganogrunerite []Mn2Fe5Si8O22(OH) C 2/m 2/m

66.01.01.06 Magnesioclinoholmquistite? Li2(Mg,Fe)3Al2Si8O22(OH)2 C 2/m 2/m

66.01.01.07 Clinoholmquistite? [](Li2Mg3Al2)Si8O22(OH)2 C 2/m 2/m

66.01.01.08 Clinoferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 C 2/m 2/m

66.01.01.08a Ferri-clinoholmquistite! []Li2Mg3(Fe3)2(Si8O22)(OH)2 C 2/m 2/m

66.01.01.08b Ferri-clinoferroholmquistite! []Li2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m

66.01.01.09 Sodic-ferripedrizite! Na(LiNa)(Fe2Mg2Li)Si8O22(OH,F)2 C 2/m 2/m

66.01.01.09a Ferripedrizite! NaLi2(Fe2Mg2Li)Si8O22(OH)2 C 2/m 2/m

66.01.01.09b Sodic-ferri-ferropedrizite! NaLi2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m

66.01.01.09c Fluoro-sodic-pedrizite! NaLi2(Mg2Al2Li)S5Si8O22F2 C 2/m 2/m

Strunz Class:

09.DE.05 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.05 Ferro-anthophyllite []Fe7Si8O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Anthophyllite []Mg7Si8O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Ferrogedrite []Fe5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Gedrite []Mg5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Ferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Holmquistite [](Li2Mg3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Cummingtonite []Mg7Si8O22(OH)2 C 2/m 2/m

09.DE.05 Clinoferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 C 2/m 2/m

09.DE.05 Grunerite []Fe7Si8O22(OH)2 C 2/m 2/m

09.DE.05 Magnesiocummingtonite (Mg,Fe)7Si8O22(OH)2 C 2/m 2/m

09.DE.05 Manganogrunerite []Mn2Fe5Si8O22(OH) C 2/m 2/m

09.DE.05 Magnesioanthophyllite? (Mg,Fe)7Si8O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Protomangano-ferro-anthophyllite! (Mn,Fe)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m

09.DE.05 Sodicgedrite NaMg6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Sodic-ferro-anthophyllite! NaFe7Si8O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Sodic-ferrogedrite! NaFe6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Sodicanthophyllite NaMg7Si8O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Permanganogrunerite! []Mn4(Fe)3(Si8O22)(OH)2 C 2/m 2/m

09.DE.05 Protoferro-anthophyllite! (Fe,Mn)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m

09.DE.05 Fluoro-sodic-pedrizite! NaLi2(Mg2Al2Li)S5Si8O22F2 C 2/m 2/m

09.DE.05 Sodic-ferri-ferropedrizite! NaLi2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m

09.DE.05 Manganocummingtonite Na(Na,Mn)2(Mg4,Fe)5Si8O22(OH)2 C 2/m 2/m

09.DE.05 Protoanthophyllite! (Mg,Fe)7Si8O22(OH)2 Pnmn 2/m 2/m 2/m

09.DE.05 Ferri-clinoferroholmquistite! []Li2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m

09.DE.05 Sodic-ferripedrizite! Na(LiNa)(Fe2Mg2Li)Si8O22(OH,F)2 C 2/m 2/m

09.DE.05 Ferripedrizite! NaLi2(Fe2Mg2Li)Si8O22(OH)2 C 2/m 2/m

Other Fluoro-sodic-pedrizite Information

References:

NAME( AmMin 90:732) PHYS. PROP.(AmMin 90:732) OPTIC PROP.(AmMin 90:732)

See Also:

Links to other databases for Fluoro-sodic-pedrizite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Fluoro-sodic-pedrizite

NaLi2(Mg2Al2Li)S5Si8O22F2
Dana No: 66.01.01.09c Strunz No: 09.DE.05
Locality:

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