Ferripedrizite Mineral Data

[Mineral Galleries] [About Me] [e-Bay Items] [Latest News] [How to Order]
A Diverse Selection of Beautifully Unique Gem & Mineral Specimens
Desert Winds Gems & Minerals • For All Levels of Collectors Worldwide
Aesthetic & Rare Mineral Specimens • Regular Updates

General Ferripedrizite Information

Chemical Formula:

NaLi2(Fe+++2Mg2Li)Si8O22(OH)2

Composition:

Molecular Weight = 839.32 gm

Potassium 0.19 % K 0.22 % K₂O

Sodium 2.11 % Na 2.84 % Na₂O

Lithium 1.94 % Li 4.17 % Li₂O

Calcium 0.24 % Ca 0.33 % CaO

Magnesium 4.31 % Mg 7.16 % MgO

Titanium 0.51 % Ti 0.86 % TiO₂

Manganese 0.46 % Mn 0.59 % MnO

Aluminum 0.68 % Al 1.28 % Al₂O₃

Zinc 0.08 % Zn 0.10 % ZnO

Iron 16.57 % Fe 7.28 % FeO / 15.60 % Fe₂O₃

Silicon 26.77 % Si 57.27 % SiO₂

Hydrogen 0.16 % H 1.41 % H₂O

Oxygen 44.43 % O

Fluorine 1.56 % F 1.56 % F

- % F -0.66 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K_0.04Na_0.52Na_0.25Ca_0.05Li_1.7Li_0.64Fe³⁺_1.64Mg_1.49Fe²⁺_0.85Al_0.21Ti_0.09Mn²⁺_0.07Zn_0.01 Si₈O₂₂(OH)_1.31F_0.69

Environment:

Episyenites (non-magmatic hydrothermal rocks) replacing cordierite-bearing monzogranites. Related to Sodic-ferripedrizite as it is the higher temperature phase.

IMA Status:

Approved IMA 2001 (Dana # Added)

Locality:

Eastern Pedriza Massif, Arroyo de la Yedra Valley, Sierra de Guadarrama, Spain. Link to MinDat.org Location Data.

Name Origin:

Named for the locality and as the ferric end member from the IMA-CNMMN and its Amphibole Subcommittee.

Synonym:

IMA2001-032

Ferripedrizite Image

Images:

Ferripedrizite

Comments: Black, bladed ferripedrizite crystals.
Location: East Pedriza Massif, Sierra de Guadarrama, Spain. Scale: See Image.
© Rruff Database

Ferripedrizite Crystallography

Axial Ratios:

a:b:c =0.5317:1:0.2962

Cell Dimensions:

a = 9.501, b = 17.866, c = 5.292, Z = 2; beta = 102.17° V = 878.10 Den(Calc)= 3.17

Crystal System:

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

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

By Intensity(I/I_o): 3.05(1)(310), 1.642(0.4)(461), 2.711(0.4)(151),1.394(0.3)(661), 2.747(0.3)(330), 8.251(0.3)(110), 2.161(0.2)(261), 2.495(0.2)(202),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Caballero J M , Oberti R , Ottolini L , American Mineralogist , 87 (2002) p.976-982, Ferripedrizite, a new monoclinic Li amphibole end-member from the, Eastern Pedriza Massif, Sierra de Guadarrama, Spain, and a restatement, of the nomenclature of Mg-Fe-Mn-Li amphiboles

Physical Properties of Ferripedrizite

Cleavage:

{110} Perfect

Color:

Black.

Diaphaneity:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Inclusions - Generally found as inclusions in other minerals.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

gray

Optical Properties of Ferripedrizite

Gladstone-Dale:

CI calc= 0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2205,KC= 0.2284
Ncalc = 1.72

Optical Data:

Biaxial (-), a=1.695, b=1.7, g=1.702, bire=0.0070, 2V(Calc)=64, 2V(Meas)=55. Dispersion r > v.

Calculated Properties of Ferripedrizite

Electron Density:

Bulk Density (Electron Density)=3.12 gm/cc
note: Specific Gravity of Ferripedrizite =3.17 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Ferripedrizite}= 6.40 barns/electron
U=PE_{Ferripedrizite} x r_electron= 19.94 barns/cc.

Radioactivity:

GRapi = 2.62 (Gamma Ray American Petroleum Institute Units)
Concentration of Ferripedrizite per GRapi unit = 38.14 (%)

Estimated Radioactivity from Ferripedrizite - barely detectable

Ferripedrizite Classification

Dana Class:

66.01.01.09a (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 Ferripedrizite Information

References:

NAME( AmMin, 87:976) PHYS. PROP.(AmMin, 87:976) OPTIC PROP.(AmMin, 87:976)

See Also:

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

Search for Ferripedrizite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Ferripedrizite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Ferripedrizite Mineral Data :

Ask about Ferripedrizite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Ferripedrizite Specimen Label here :

Ferripedrizite

NaLi2(Fe+++2Mg2Li)Si8O22(OH)2
Dana No: 66.01.01.09a Strunz No: 09.DE.05
Locality:

Notes: