Arrojadite-(KNa) 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 Arrojadite-(KNa) Information

Chemical Formula:

KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2

Composition:

Molecular Weight = 2,033.01 gm

Potassium 1.60 % K 1.92 % K₂O

Sodium 5.67 % Na 7.64 % Na₂O

Strontium 0.04 % Sr 0.05 % SrO

Lithium 0.00 % Li 0.01 % Li₂O

Calcium 1.79 % Ca 2.51 % CaO

Magnesium 3.22 % Mg 5.33 % MgO

Titanium 0.05 % Ti 0.08 % TiO₂

Manganese 2.78 % Mn 3.59 % MnO

Aluminum 1.38 % Al 2.61 % Al₂O₃

Zinc 0.03 % Zn 0.04 % ZnO

Iron 25.66 % Fe 33.01 % FeO

Silicon 0.01 % Si 0.03 % SiO₂

Phosphorus 18.27 % P 41.86 % P₂O₅

Hydrogen 0.15 % H 1.32 % H₂O

Oxygen 39.33 % O

Fluorine 0.03 % F 0.03 % F

- % F -0.01 % -O=F₂

______ ______

100.00 % 100.01 % = TOTAL OXIDE

Empirical Formula:

K_0.83Na_5.01Ca_0.91Sr_0.01Fe²⁺_9.34Mg_2.69Mn²⁺_1.03Zn_0.01Li_0.01Al_1.04Ti_0.02(OH)_1.97F_0.03 P_11.99Si_0.01O₄₇(OH)

Environment:

Occurs as coating of open fractures in siderite-rich Lower Cretaceous sandstones of the Rapid Creek area. Arrojadite group

IMA Status:

Approved IMA 2005 (Dana # Added)

Locality:

Rapid Creek, Yukon Territory, Canada Link to MinDat.org Location Data.

Name Origin:

Named after arrojadite and site occupancy of the arrojadite structure.

Name Pronunciation:

Arrojadite-(KNa) + Pronunciation

Synonym:

IMA2005-047

Arrojadite-(KNa) Image

Images:

Arrojadite-(KNa)

Comments: Brownish crystals of arrojadite-(KNa).
Location: Big Fish River, Dawson Mining District, Yukon Territory, Canada. Scale: Picture Size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Arrojadite-(KNa) Crystallography

Axial Ratios:

a:b:c =1.6435:1:2.4517

Cell Dimensions:

a = 16.522, b = 10.0529, c = 24.6477, Z = 4; beta = 106.509° V = 3,925.07 Den(Calc)= 3.44

Crystal System:

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

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

By Intensity(I/I_o): 3.0498(1), 2.6908(0.713), 5.8614(0.288),2.7933(0.28), 5.0264(0.275), 2.7979(0.249), 2.7774(0.244),

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

Camara F , Oberti R , Chopin C , Medenbach O , American Mineralogist , 91 (2006) p.1249-1259, The arrojadite enigma: I. A new formula and, a new model for the arrojadite structure, Sample: Rapid Creek, Yukon, Canada

Physical Properties of Arrojadite-(KNa)

Diaphaneity:

Transparent

Luster:

Vitreous (Glassy)

Optical Properties of Arrojadite-(KNa)

Optical Data:

NCalc= 1.65 - from Gladstone-Dale relationship (KC = 0.1904) where Ncalc=Dcalc*KC+1

Calculated Properties of Arrojadite-(KNa)

Electron Density:

Bulk Density (Electron Density)=3.34 gm/cc
note: Specific Gravity of Arrojadite-(KNa) =3.44 gm/cc.

Fermion Index:

Fermion Index = 0.0089836476
Boson Index = 0.9910163524

Photoelectric:

PE_{Arrojadite-(KNa)}= 9.92 barns/electron
U=PE_{Arrojadite-(KNa)} x r_electron= 33.17 barns/cc.

Radioactivity:

GRapi = 22.39 (Gamma Ray American Petroleum Institute Units)
Concentration of Arrojadite-(KNa) per GRapi unit = 4.47 (%)

Estimated Radioactivity from Arrojadite-(KNa) - barely detectable

Arrojadite-(KNa) Classification

Dana Class:

41.07.02a.01 (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-(KNa) Information

References:

NAME( AmMin, v91,1249) PHYS. PROP.(AmMin, v91, p1249)

See Also:

Links to other databases for Arrojadite-(KNa) :
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 Arrojadite-(KNa) using:

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

Visit our Advertisers for Arrojadite-(KNa) :

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 Arrojadite-(KNa) Mineral Data :

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

Arrojadite-(KNa)

KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2
Dana No: 41.07.02a.01 Strunz No: 08.BF.05
Locality:

Notes: