Arrojadite-(BaFe) Mineral Data

Advertisment

McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

Dakota Matrix was founded in 1996 and has offered systematic and rare mineral specimens online since 1998.

General Arrojadite-(BaFe) Information

Chemical Formula:

(Ba,K,Pb)Na3(Ca,Sr)(Fe++,Mg,Mn)14Al(PO4)11(PO3OH)(OH,F)2

Composition:

Molecular Weight = 2,242.07 gm

Potassium 0.17 % K 0.21 % K₂O

Barium 4.90 % Ba 5.47 % BaO

Sodium 3.08 % Na 4.15 % Na₂O

Strontium 0.78 % Sr 0.92 % SrO

Calcium 1.43 % Ca 2.00 % CaO

Magnesium 6.18 % Mg 10.25 % MgO

Manganese 0.49 % Mn 0.63 % MnO

Aluminum 1.20 % Al 2.27 % Al₂O₃

Iron 20.18 % Fe 25.96 % FeO

Phosphorus 16.58 % P 37.99 % P₂O₅

Hydrogen 0.09 % H 0.80 % H₂O

Lead 9.24 % Pb 9.96 % PbO

Oxygen 35.68 % O

______ ______

100.00 % 100.61 % = TOTAL OXIDE

Empirical Formula:

Na₃Ba_0.8K_0.1PbCa_0.8Sr_0.2Fe²⁺_8.1Mg_5.7Mn²⁺_0.2Al(PO₄)₁₂(OH)₂

Environment:

In a phengitic quartzite. The species name sigimundite is replaced by the name arrojadite-(BaFe)

IMA Status:

Approved IMA 1996 (Dana # Added)

Locality:

Near Madesimo, Spluga Valley, Central Alps, Italy. Link to MinDat.org Location Data.

Name Origin:

Originally for Pietro Sigismund (1874-1962), renamed arrojadite-(BaFe) in 2005 by the IMA.

Name Pronunciation:

Arrojadite-(BaFe) + Pronunciation

Synonym:

IMA1994-033

IMA2005 No 05-D

Sigismundite

Arrojadite-(BaFe) Image

Images:

Arrojadite-(BaFe)

Comments: Small grain of Arrojadite-(BaFe).
Location: Big Fish River, Yukon, Canada. Scale: Not Given.
© Sergey Vasiliev / Systematic Mineralogy

Arrojadite-(BaFe) Crystallography

Axial Ratios:

a:b:c =1.6506:1:2.4604

Cell Dimensions:

a = 16.394, b = 9.932, c = 24.437, Z = 4; beta = 105.78° V = 3,829.00 Den(Calc)= 3.89

Crystal System:

Monoclinic - DomaticH-M Symbol (m) Space Group: Cc

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

By Intensity(I/I_o): 3.01(1), 3.181(0.51), 2.678(0.42),

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

Demartin F , Gramaccioli C M , Pilati T , Sciesa E , The Canadian Mineralogist , 34 (1996) p.827-834, Sigismundite, (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(OH)2(PO4)12, a new, Ba-rich member of the arrojadite group from Spluga Valley, Italy, Locality: Spluga Valley, Italy

Physical Properties of Arrojadite-(BaFe)

Cleavage:

{???} Perfect

Color:

Grayish green.

Density:

3.54

Diaphaneity:

Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Luster:

Greasy (Oily)

Streak:

white

Optical Properties of Arrojadite-(BaFe)

Gladstone-Dale:

CI meas= -0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.08 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1671,KPDmeas= 0.1836,KC= 0.1816
Ncalc = 1.64 - 1.71

Optical Data:

Biaxial (+/-), b=1.65

Calculated Properties of Arrojadite-(BaFe)

Electron Density:

Bulk Density (Electron Density)=3.36 gm/cc
note: Specific Gravity of Arrojadite-(BaFe) =3.54 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_{Arrojadite-(BaFe)}= 178.53 barns/electron
U=PE_{Arrojadite-(BaFe)} x r_electron= 600.02 barns/cc.

Radioactivity:

GRapi = 2.40 (Gamma Ray American Petroleum Institute Units)
Concentration of Arrojadite-(BaFe) per GRapi unit = 41.73 (%)

Estimated Radioactivity from Arrojadite-(BaFe) - barely detectable

Arrojadite-(BaFe) Classification

Dana Class:

41.07.02a.05 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.07)where (A B)m (XO4)4 Zq

(41.07.02a)Arrojadite Group (Arrojadite Subgroup) (Al in Al site, OH in W site, Fe in M site)

41.07.02a.00 Arrojadite! KNa4CaMn4Fe10Al(PO4)12(OH,F)2 Cc m

41.07.02a.01 Arrojadite-(KNa)! KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

41.07.02a.02 Arrojadite-(KFe)! KNa2CaNa2(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

41.07.02a.03 Arrojadite-(NaFe)! NaNa2CaNa2(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

41.07.02a.04 Arrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

41.07.02a.05 Arrojadite-(BaFe)! (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(PO4)11(PO3OH)(OH,F)2 Cc m

41.07.02a.06 Arrojadite-(SrFe)! SrFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

41.07.02a.07 Arrojadite-(PbFe)! PbFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

Strunz Class:

08.BF.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BF -With medium-sized and large cations, (OH, etc.):RO4 < 0.5:1

08.BF.05 Arrojadite! KNa4CaMn4Fe10Al(PO4)12(OH,F)2 Cc m

08.BF.05 Dickinsonite! KNa4Ca(Mn,Fe)14Al(PO4)12(OH)2 Cc m

08.BF.05 Arrojadite-(BaFe)! (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(PO4)11(PO3OH)(OH,F)2 Cc m

08.BF.05 Arrojadite-(KFe)! KNa2CaNa2(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

08.BF.05 Arrojadite-(NaFe)! NaNa2CaNa2(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

08.BF.05 Arrojadite-(SrFe)! SrFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

08.BF.05 Arrojadite-(KNa)! KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

08.BF.05 Dickinsonite-(KNa)! KNa4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m

08.BF.05 Arrojadite-(PbFe)! PbFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

08.BF.05 Fluorarrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2 Cc m

08.BF.05 Arrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

08.BF.05 Fluorarrojadite-(KNa)! KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2 Cc m

08.BF.05 Fluorarrojadite-(BaFe)! (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(PO4)11(PO3OH)(F,OH)2 Cc m

08.BF.05 Ferri-arrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2 Cc m

08.BF.05 Dickinsonite-(KMnNa)! KNaMnNa3Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m

08.BF.05 Dickinsonite-(KNaNa)! KNaNa4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m

08.BF.05 Dickinsonite-(NaNa)! Na2Na4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m

Other Arrojadite-(BaFe) Information

References:

NAME( MinRec, Vol. 28, No. 3) PHYS. PROP.(Am.Min.,Vol.82,p432,1997) OPTIC PROP.(Am.Min.,Vol.82,p432,1997)

See Also:

Links to other databases for Arrojadite-(BaFe) :
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

Search for Arrojadite-(BaFe) using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Arrojadite-(BaFe) :

A Bijoux Google Search for Arrojadite-(BaFe)
Adam's Minerals Google Search for Arrojadite-(BaFe)
Cape Minerals Google Search for Arrojadite-(BaFe)
Dakota Matrix Minerals Google Search for Arrojadite-(BaFe)
Excalibur Mineral Corp. Google Search for Arrojadite-(BaFe)
Exceptional Minerals Google Search for Arrojadite-(BaFe)
John Betts Fine Minerals Search for Arrojadite-(BaFe)
McDougall Minerals Google Search for Arrojadite-(BaFe)
Mineral News Website Link
Rock and Mineral Shows Google Search for Arrojadite-(BaFe)
Weinrich Minerals, Inc. Google Search for Arrojadite-(BaFe)

Ask about Arrojadite-(BaFe) 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 Arrojadite-(BaFe) Specimen Label here :

Arrojadite-(BaFe)

(Ba,K,Pb)Na3(Ca,Sr)(Fe++,Mg,Mn)14Al(PO4)11(PO3OH)(OH,F)2
Dana No: 41.07.02a.05 Strunz No: 08.BF.05
Locality:

Notes: