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Hogtuvaite Mineral Data

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General Hogtuvaite Information

Help on Chemical  Formula: Chemical Formula: (Ca,Na)2(Fe++,Fe+++,Ti,Mg,Mn)6(Si,Be,Al)6O20
Help on Composition: Composition: Molecular Weight = 837.17 gm
   Sodium      1.37 %  Na    1.85 % Na2O
   Calcium     7.18 %  Ca   10.05 % CaO
   Magnesium   1.45 %  Mg    2.41 % MgO
   Titanium    5.15 %  Ti    8.59 % TiO2
   Manganese   0.66 %  Mn    0.85 % MnO
   Beryllium   1.94 %  Be    5.38 % BeO
   Aluminum    1.93 %  Al    3.65 % Al2O3
   Iron       30.02 %  Fe   25.75 % FeO / 14.31 % Fe2O3
   Silicon    12.08 %  Si   25.84 % SiO2
   Oxygen     38.22 %  O
             ______        ______ 
             100.00 %       98.66 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca1.5Na0.5Fe2+3Fe3+1.5Ti0.9Mg0.5Mn2+0.1Si3.6Be1.8Al0.6O20
Help on Environment: Environment: As a late-stage metamorphic mineral in peraluminous granitic gneisses and mafic pegmatites associated with a beryllium deposit (near Mo i Rana, Norway).
Help on IMA Status: IMA Status: Approved IMA 1994
Help on Locality: Locality: Found about 16 km northwest of Mo i Rana, Norway Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Hogtuva Mountain, near the type locality in Norway.
Help on Name Pronunciation: Name Pronunciation: Hogtuvaite + Pronunciation Say HOGTUVAITE
Help on Synonym: Synonym: Hoegtuvaite

Hogtuvaite Image

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Comments: Dark platy crystals of hogtuvaite in matrix.
Location: Hogtuva, Mo i Rana, Nordland, Norway. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hogtuvaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.962:1:0.8257
Help on Cell Dimensions: Cell Dimensions: a = 10.317, b = 10.724, c = 8.855, Z = 2; alpha = 105.77°, beta = 96.21°, gamma = 124.77° V = 769.95 Den(Calc)= 3.61
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.5293(1), 8.048(0.9), 2.0979(0.63),

Physical Properties of Hogtuvaite

Help on Color: Color: Black.
Help on Density: Density: 3.85
Help on Diaphaneity: Diaphaneity: Subtranslucent to Opaque
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Subadamantine

Optical Properties of Hogtuvaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.106 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.097 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.21,KPDmeas= 0.2078,KC= 0.2325
Ncalc = 1.89 - 1.9
Help on Optical Data: Optical Data: Biaxial (-), a=1.78, g=1.82, bire=0.0400

Calculated Properties of Hogtuvaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.70 gm/cc
note: Specific Gravity of Hogtuvaite =3.81 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEHogtuvaite = 11.51 barns/electron
U=PEHogtuvaite x rElectron Density= 42.57 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hogtuvaite is Not Radioactive

Hogtuvaite Classification

Help on  Dana Class: Dana Class: 69.02.01a.03 (69)Inosilicate Chains with Side Branches or Loops
  (69.02)with P>2
  (69.02.01a)Aenigmatite and related species (Aenigmatite subgroup)
69.02.01a.01 Aenigmatite (Na,Ca)4(Fe,Ti,Mg)12Si12O40 P1 1
69.02.01a.02 Dorrite Ca2Mg2Fe4(Al,Fe)4Si2O20 P1,P 1 Tri
69.02.01a.03 Hogtuvaite (Ca,Na)2(Fe,Fe,Ti,Mg,Mn)6(Si,Be,Al)6O20 P1 1
69.02.01a.04 Krinovite NaMg2CrSi3O10 P1 1
69.02.01a.05 Rhonite Ca2(Mg,Fe,Fe,Ti)6(Si,Al)6O20 P1 1
69.02.01a.06 Serendibite Ca2(Mg,Al)6(Si,Al,B)6O20 P1 1
69.02.01a.07 Welshite Ca4Mg9Sb3O4[Si6Be3AlFe2O36] P1 1
69.02.01a.08 Wilkinsonite Na2Fe4Fe2Si6O20 P1 1
69.02.01a.09 Makarochkinite! Ca2Fe4FeTiSi4BeAlO20 P1 1
Help on  Strunz Class: Strunz Class: 09.DH.40 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DH -Inosilicates with 4-periodic single chains, Si4O12
09.DH.40 Hogtuvaite (Ca,Na)2(Fe,Fe,Ti,Mg,Mn)6(Si,Be,Al)6O20 P1 1

Other Hogtuvaite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(37th List of New Min.,Min. Mag. 1996) OPTIC PROP.(37th List of New Min.,Min. Mag. 19)
Help on See Also: See Also: Links to other databases for Hogtuvaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: 69.02.01a.03 Strunz No: 09.DH.40





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