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Indigirite Mineral Data
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General Indigirite Information
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 Chemical Formula: |
Mg2Al2(CO3)4(OH)2•15(H2O) |
| Composition: |
Molecular Weight = 646.85 gm |
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Magnesium 7.51 % Mg 12.46 % MgO |
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Aluminum 8.34 % Al 15.76 % Al2O3 |
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Hydrogen 4.99 % H 44.56 % H2O |
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Carbon 7.43 % C 27.21 % CO2 |
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Oxygen 71.73 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Mg2Al2(CO3)4(OH)2•15(H2O) |
| Environment: |
Alteration zone. |
| IMA Status: |
Approved IMA 1971 |
| Locality: |
Sarylakh Au-Sb deposit, Indigirka River, northeastern Yakutia, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named after the locality. |
| Name Pronunciation: |
Indigirite + Pronunciation  |
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Indigirite Crystallography
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| Crystal System: |
Monoclinic Space Group: Unk. |
| X Ray Diffraction: |
By Intensity(I/Io): 5.8(1), 5.24(0.9), 7.62(0.9), |
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Physical Properties of Indigirite
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| Color: |
Snow white. |
| Density: |
1.6 |
| Diaphaneity: |
Translucent |
| Fracture: |
Flexible - Flexible fragments. |
| Habit: |
Acicular - Occurs as needle-like crystals. |
| Hardness: |
2 - Gypsum |
| Luster: |
Vitreous - Silky |
| Streak: |
white |
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Optical Properties of Indigirite
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| Gladstone-Dale: |
CI meas= -0.142 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.3044,KC= 0.2665
Ncalc = 1.43 |
| Optical Data: |
Uniaxial (+), w=1.472, e=1.502, bire=0.0300. |
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Calculated Properties of Indigirite
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| Electron Density: |
Bulk Density (Electron Density)=1.67 gm/cc
note: Specific Gravity of Indigirite =1.60 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0086836223
Boson Index = 0.9913163777 |
| Photoelectric: |
PEIndigirite = 0.65 barns/electron
U=PEIndigirite x rElectron Density= 1.09 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Indigirite is Not Radioactive |
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Indigirite Classification
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| Dana Class: |
16b.01.03.01 (16b)Carbonates - Hydroxyl or Halogen |
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(16b.01)where (A)m (B)n (XO3)p Zq, with (m+n):p=1:1 |
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(16b.01.03)Dana Group |
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16b.01.03.01 Indigirite Mg2Al2(CO3)4(OH)2•15(H2O) Unk. Mono |
| Strunz Class: |
05.DA.65 05 - CARBONATES (NITRATES) |
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05.D - Carbonates with Additional Anions, with H2O |
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05.DA -With medium-sized cations |
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05.DA.65 Indigirite Mg2Al2(CO3)4(OH)2•15(H2O) Unk. Mono |
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Other Indigirite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) |
| See Also: |
Links to other databases for Indigirite :
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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Print or Cut-and-Paste your Indigirite Specimen Label here :
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Indigirite
Mg2Al2(CO3)4(OH)2•15(H2O)
Dana No: 16b.01.03.01 Strunz No: 05.DA.65
Locality:
Notes:
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