Arctite Mineral Data

Arctite Mineral Data
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General Arctite Information

Help on Chemical Formula: Chemical Formula: Na2Ca4(PO4)3F
Help on Composition: Composition: Molecular Weight = 510.20 gm
   Sodium       9.01 %  Na   12.15 % Na2O
   Calcium     31.42 %  Ca   43.96 % CaO
   Phosphorus  18.21 %  P    41.73 % P2O5
   Oxygen      37.63 %  O
   Fluorine     3.72 %  F     3.72 % F
                 -   %   F    -1.57 % -O=F2    
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Ca4(PO4)3F
Help on Environment: Environment: Found in a drill core.
Help on IMA Status: IMA Status: Approved IMA 1981
Help on Locality: Locality: Drill core from the valley of the Vounnimi River, Khibina alkalic massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the arctic region where it was found.
Help on Name Pronunciation: Name Pronunciation: Arctite Say ARCTITE
Help on Synonym: Synonym: ICSD 20649
  PDF 33-1228
 

Arctite Image

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Arctite

Comments: Clear glassy crystalline arctite with magenta villiaumite in pegmatite.
Location: Vuonnemiok River, Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Arctite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:5.82127
Help on Cell Dimensions: Cell Dimensions: a = 7.078, c = 41.203, Z = 6; V = 1,787.64 Den(Calc)= 2.84
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.746(1), 3.43(0.32), 13.8(0.25),
Click Here for Large Arctite Structure Window Crystal Structure:

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Sokolova E V , Yamnova N A , Egorov-Tismenko Yu K , Khomyakov A P , Doklady Akademii Nauk SSSR , 274 (1984) p.78-83, The crystal structure of a new phosphate of Na,Ca and Ba: (Na5Ca)Ca6Ba(PO4)6F3

 

Physical Properties of Arctite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Colorless.
Help on Density: Density: 3.11 - 3.13, Average = 3.12
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white
 

Optical Properties of Arctite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.044 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.051 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2033,KPDmeas= 0.1851,KC= 0.1935
Ncalc = 1.55 - 1.61
Help on Optical Data: Optical Data: Uniaxial (-), e=1.577, w=1.578, bire=0.0010.
 

Calculated Properties of Arctite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.08 gm/cc
note: Specific Gravity of Arctite =3.12 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0006048124
Boson Index = 0.9993951876
Help on Photoelectric: Photoelectric: PEArctite = 4.91 barns/electron
U=PEArctite x rElectron Density= 15.14 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Arctite is Not Radioactive
 

Arctite Classification
Help on Dana Class: Dana Class: 41.05.18.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.18)Dana Group
 
41.05.18.01 Arctite Na2Ca4(PO4)3F R 3m 3 2/m
Help on Strunz Class: Strunz Class: 08.BN.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BN -With only large cations, (OH, etc.):RO4 = 0.33:1
 
08.BN.10 Arctite Na2Ca4(PO4)3F R 3m 3 2/m
 

Other Arctite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Arctite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Arctite

Na2Ca4(PO4)3F
Dana No: 41.05.18.01 Strunz No: 08.BN.10
Locality:

 

Notes: