General Hogtuvaite Information
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Chemical Formula: |
(Ca,Na)2(Fe++,Fe+++,Ti,Mg,Mn)6(Si,Be,Al)6O20 |
Composition: |
Molecular Weight = 837.17 gm |
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Sodium 1.37 % Na 1.85 % Na2O |
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Calcium 7.18 % Ca 10.05 % CaO |
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Magnesium 1.45 % Mg 2.41 % MgO |
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Titanium 5.15 % Ti 8.59 % TiO2 |
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Manganese 0.66 % Mn 0.85 % MnO |
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Beryllium 1.94 % Be 5.38 % BeO |
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Aluminum 1.93 % Al 3.65 % Al2O3 |
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Iron 30.02 % Fe 25.75 % FeO / 14.31 % Fe2O3 |
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Silicon 12.08 % Si 25.84 % SiO2 |
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Oxygen 38.22 % O |
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______ ______ |
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100.00 % 98.66 % = TOTAL OXIDE |
Empirical Formula: |
Ca1.5Na0.5Fe2+3Fe3+1.5Ti0.9Mg0.5Mn2+0.1Si3.6Be1.8Al0.6O20 |
IMA Status: |
Approved IMA 1994 |
Locality: |
Link to MinDat.org Location Data. |
Synonym: |
Hoegtuvaite |
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IMA1990-051 |
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Makarochkinite |
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Hogtuvaite Image |
Images:
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Hogtuvaite Crystallography
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Axial Ratios: |
a:b:c =0.962:1:0.8257 |
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 |
Crystal System: |
Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 |
X Ray Diffraction: |
By Intensity(I/Io): 2.5293(1), 8.048(0.9), 2.0979(0.63), |
Crystal Structure:
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Help on Above
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Grew E S , Barbier J , Britten J , Yates M G , Polyakov V O , Shcherbakova E P , Halenius U , Shearer C K , American Mineralogist , 90 (2005) p.1402-1412, Makarochkinite, Ca2Fe2+4Fe3+TiSi4BeAlO20, a new beryllosilicate member of the, aenigmatite-sapphirine-surinamite group from the Il men Mountains (southern, Urals), Russia, Sample: N86
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Physical Properties of Hogtuvaite
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Color: |
Black. |
Density: |
3.85 |
Diaphaniety: |
Subtranslucent to Opaque |
Hardness: |
5.5 - Knife Blade |
Luster: |
Subadamantine |
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Optical Properties of Hogtuvaite
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Optical Data: |
Biaxial (-), a=1.78, g=1.82, bire=0.0400 |
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Calculated Properties of Hogtuvaite
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Electron Density: |
relectron=3.50 gm/cc note: rHogtuvaite =3.61 gm/cc. |
Fermion Index |
Fermion Index = 0.03976 Boson Index = 0.96024 |
Photoelectric: |
PEHogtuvaite = 11.51 barns/electron U=PEHogtuvaite x relectron= 40.33 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Hogtuvaite is Not Radioactive |
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Hogtuvaite Classification
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Dana Class: |
69.2.1a.3 (69)Inosilicate Chains with Side Branches or Loops |
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(69.2)with P>2 |
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(69.2.1a)Aenigmatite and related species (Aenigmatite subgroup) |
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69.2.1a.1 Aenigmatite Na2Fe5TiSi6O20 P1 1 |
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69.2.1a.2 Dorrite Ca2Mg2Fe4(Al,Fe)4Si2O20 P1,P 1 Tri |
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69.2.1a.3 Hogtuvaite (Ca,Na)2(Fe,Fe,Ti,Mg,Mn)6(Si,Be,Al)6O20 P1 1 |
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69.2.1a.4 Krinovite NaMg2CrSi3O10 P1 1 |
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69.2.1a.5 Rhonite Ca2(Mg,Fe,Fe,Ti)6(Si,Al)6O20 P1 1 |
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69.2.1a.6 Serendibite Ca2(Mg,Al)6(Si,Al,B)6O20 P1 1 |
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69.2.1a.7 Welshite Ca2Mg4(Mn,Fe)Sb2O2[Si3Be2O18] P1 1 |
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69.2.1a.8 Wilkinsonite Na2Fe4Fe2Si6O20 P1 1 |
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69.2.1a.9 IMA2002-009a! Ca2Fe4FeTiSi4BeAlO20 P1 1 |
Strunz Class: |
VIII/F.14-35 VIII - Silicates |
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VIII/F - Inosilicates (chain and band) modified double chains |
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VIII/F.14 - Aenigmatite group |
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VIII/F.14-10 Krinovite NaMg2CrSi3O10 P1 1 |
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VIII/F.14-20 Aenigmatite Na2Fe5TiSi6O20 P1 1 |
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VIII/F.14-30 Wilkinsonite Na2Fe4Fe2Si6O20 P1 1 |
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VIII/F.14-35 Hogtuvaite (Ca,Na)2(Fe,Fe,Ti,Mg,Mn)6(Si,Be,Al)6O20 P1 1 |
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VIII/F.14-40 Dorrite Ca2Mg2Fe4(Al,Fe)4Si2O20 P1,P 1 Tri |
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VIII/F.14-50 Rhonite Ca2(Mg,Fe,Fe,Ti)6(Si,Al)6O20 P1 1 |
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VIII/F.14-60 Serendibite Ca2(Mg,Al)6(Si,Al,B)6O20 P1 1 |
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VIII/F.14-70 Welshite Ca2Mg4(Mn,Fe)Sb2O2[Si3Be2O18] P1 1 |
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Other Hogtuvaite Information
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References: |
NAME( Athena) PHYS. PROP.(37th List of New Min.,Min. Mag. 1996) OPTIC PROP.(37th List of New Min.,Min. Mag. 19) |
See Also: |
Links to other databases for Hogtuvaite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - EUROmin Project
4 -Google Images
5 -Google Scholar
6 -Handbook of Mineralogy (MinSocAm)
7 -Handbook of Mineralogy (UofA)
8 -MinDAT
9 -MinMax(Deutsch)
10 -MinMax(English)
11 -Mineralienatlas (Deutsch)
12 -QUT Mineral Atlas
13 -École des Mines de Paris
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Print or Cut-and-Paste your Hogtuvaite Specimen Label here :
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Hogtuvaite
(Ca,Na)2(Fe++,Fe+++,Ti,Mg,Mn)6(Si,Be,Al)6O20
Dana No: 69.2.1a.3 Strunz No: VIII/F.14-35
Locality:
Notes:
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