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Wardsmithite Mineral Data
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General Wardsmithite Information
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 Chemical Formula: |
Ca5MgB24O42•30(H2O) |
| Composition: |
Molecular Weight = 1,696.57 gm |
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Calcium 11.81 % Ca 16.53 % CaO |
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Magnesium 1.43 % Mg 2.38 % MgO |
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Boron 15.29 % B 49.24 % B2O3 |
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Hydrogen 3.56 % H 31.86 % H2O |
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Oxygen 67.90 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Ca5MgB24O42•30(H2O) |
| Environment: |
Continental borate-bearing evaporite deposits. |
| IMA Status: |
Approved IMA 1970 |
| Locality: |
Furnace Creek district, Inyo County, and Boron, Kern County, California, USA Link to MinDat.org Location Data. |
| Name Origin: |
Named for Ward C. Smith (1906-), U. S. Geologist. |
| Name Pronunciation: |
Wardsmithite + Pronunciation  |
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Wardsmithite Crystallography
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| Crystal System: |
Hexagonal Space Group: Unk |
| X Ray Diffraction: |
By Intensity(I/Io): 13.5(1), 12.3(0.62), 6.12(0.55),3.36(0.5), 4.72(0.4), 2.74(0.3), 6.73(0.2), 7.43(0.2), |
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Physical Properties of Wardsmithite
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| Cleavage: |
{0001} Good |
| Color: |
Colorless, White. |
| Density: |
1.88 |
| Diaphaneity: |
Transparent |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Habit: |
Nodular - Tuberose forms having irregular protuberances over the surface. |
| Hardness: |
2.5 - Finger Nail |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties of Wardsmithite
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| Gladstone-Dale: |
CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2569,KC= 0.2536
Ncalc = 1.48 |
| Optical Data: |
Uniaxial (-), e=1.476, w=1.49, bire=0.0140. |
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Calculated Properties of Wardsmithite
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| Electron Density: |
Bulk Density (Electron Density)=1.92 gm/cc
note: Specific Gravity of Wardsmithite =1.88 gm/cc.
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| Fermion Index: |
Fermion Index = 0.03
Boson Index = 0.97 |
| Photoelectric: |
PEWardsmithite = 1.72 barns/electron
U=PEWardsmithite x rElectron Density= 3.32 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wardsmithite is Not Radioactive |
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Wardsmithite Classification
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| Dana Class: |
26.07.07.01 (26)Hydrated Borates Containing Hydroxyl or Halogen |
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(26.07)Dana Type |
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(26.07.07)Dana Group |
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26.07.07.01 Wardsmithite Ca5MgB24O42•30(H2O) Unk Hex |
| Strunz Class: |
06.HA.25 06 - BORATES |
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06.H - Unclassified Borates |
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06.HA -Unclassified borates |
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06.HA.25 Wardsmithite Ca5MgB24O42•30(H2O) Unk Hex |
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Other Wardsmithite Information
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| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Wardsmithite :
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 Wardsmithite Specimen Label here :
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Wardsmithite
Ca5MgB24O42•30(H2O)
Dana No: 26.07.07.01 Strunz No: 06.HA.25
Locality:
Notes:
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