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Hummerite Mineral Data
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General Hummerite Information
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 Chemical Formula: |
KMgV+++++5O14•8(H2O) |
| Composition: |
Molecular Weight = 686.22 gm |
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Potassium 5.70 % K 6.86 % K2O |
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Magnesium 3.54 % Mg 5.87 % MgO |
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Vanadium 37.12 % V 66.26 % V2O5 |
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Hydrogen 2.35 % H 21.00 % H2O |
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Oxygen 51.29 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
KMgV5+5O14•8(H2O) |
| Environment: |
Encrustations on sandstone. |
| IMA Status: |
Valid Species (Pre-IMA) 1951 |
| Locality: |
Hummer mine, Montrose County, Colorado, USA. Link to MinDat.org Location Data. |
| Name Origin: |
Named after the locality. |
| Name Pronunciation: |
Hummerite + Pronunciation  |
| Synonym: |
ICSD 39216 |
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PDF 14-155 |
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Hummerite Image |
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Images:
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Hummerite Crystallography
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| Axial Ratios: |
a:b:c =0.8223:1:1.0324 |
| Cell Dimensions: |
a = 8.8178, b = 10.723, c = 11.0707, Z = 2; alpha = 65.798°, beta = 74.057°, gamma = 71.853° V = 872.38 Den(Calc)= 2.61 |
| Crystal System: |
Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1 |
| X Ray Diffraction: |
By Intensity(I/Io): 8.2(1), 7.4(0.7), 2.73(0.6),7(0.5), 2.11(0.4), 3.13(0.4), 3.31(0.4), 9.3(0.3), |
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Physical Properties of Hummerite
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| Color: |
Yellow, Light orange. |
| Diaphaneity: |
Translucent |
| Habit: |
Platy - Sheet forms (e.g. micas). |
| Habit: |
Water Soluble - Water soluble mineral. |
| Hardness: |
2 - Gypsum |
| Luster: |
Pearly |
| Streak: |
yellow |
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Optical Properties of Hummerite
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| Gladstone-Dale: |
CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3176,KC= 0.3219
Ncalc = 1.82 |
| Optical Data: |
Biaxial (-), b=1.81 |
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Calculated Properties of Hummerite
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| Electron Density: |
Bulk Density (Electron Density)=2.51 gm/cc
note: Specific Gravity of Hummerite =2.55 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0047263434
Boson Index = 0.9952736566 |
| Photoelectric: |
PEHummerite = 7.66 barns/electron
U=PEHummerite x relectron= 19.23 barns/cc.
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| Radioactivity: |
GRapi = 80.97 (Gamma Ray American Petroleum Institute Units)
Concentration of Hummerite per GRapi unit = 1.24 (%)
Estimated Radioactivity from Hummerite  - barely detectable
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Hummerite Classification
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| Dana Class: |
47.02.02.01 (47)Vanadium Oxysalts |
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(47.02)(VmOn) |
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(47.02.02)Dana Group |
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47.02.02.01 Hummerite KMgV5O14•8(H2O) P1 1 |
| Strunz Class: |
04.HC.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.H - V[5,6] Vanadates |
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04.HC -[6]-Sorovanadates |
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04.HC.10 Hummerite KMgV5O14•8(H2O) P1 1 |
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Other Hummerite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8, AmMin, v 88, p 1179) OPTIC PROP.(Dana8) |
| See Also: |
Links to other databases for Hummerite :
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 Hummerite Specimen Label here :
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Hummerite
KMgV+++++5O14•8(H2O)
Dana No: 47.02.02.01 Strunz No: 04.HC.10
Locality:
Notes:
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