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Wardsmithite

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Ward C. Smith
Formula:
Ca5Mg[B4O7]6 · 30H2O
Colour:
Colourless, white
Lustre:
Vitreous
Hardness:
Specific Gravity:
1.88
Crystal System:
Hexagonal
Name:
Named after Ward Cromwell Smith (6 February 1906, St. Louis, Missouri, USA - 25 June 1998, Cupertino, California, USA), geologist, U.S. Geological Survey who worked with borates.
This page provides mineralogical data about Wardsmithite.


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Classification of WardsmithiteHide

Approved
Approval Year:
1967
First Published:
1970
6.H0.25

6 : BORATES
H : Unclassified borates
0 :
26.7.7.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
9.3.24

9 : Borates
3 : Borates of Ca and Sr

Pronounciation of WardsmithiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of WardsmithiteHide

Vitreous
Transparency:
Transparent
Colour:
Colourless, white
Streak:
White
Hardness:
2½ on Mohs scale
Cleavage:
Distinct/Good
basal
Density:
1.88(2) g/cm3 (Measured)    

Optical Data of WardsmithiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.490() nε = 1.476(2)
Max Birefringence:
δ = 0.014
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of WardsmithiteHide

Formula:
Ca5Mg[B4O7]6 · 30H2O
IMA Formula:
Ca5Mg(B4O7)6 · 30H2O

Crystallography of WardsmithiteHide

Crystal System:
Hexagonal
Morphology:
anhedral with platy habit

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
13.5 (100)
12.3 (62)
6.12 (55)
3.358 (51)
4.721 (42)
2.74 (26)

Type Occurrence of WardsmithiteHide

General Appearance of Type Material:
fine grained nodules
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 136414, 147955, 147956.
Geological Setting of Type Material:
weathered veins of colemanite and priceite
Associated Minerals at Type Locality:
Reference:
Erd, R.C., J.F. McAllister & A.C. Vlisidis (1970) Wardsmithite 5CaO•MgO•12B2O3•30H2O, a new borate mineral from the Death Valley region, California: American Mineralogist: 55: 349-357.

Synonyms of WardsmithiteHide

Other Language Names for WardsmithiteHide

Related Minerals - Nickel-Strunz GroupingHide

6.H0.10Braitschite-(Ce)(Ca,Na2)7(Ce,La)2B22O43 · 7H2OHex.
6.H0.15SatimoliteKNa2(Al5Mg2)[B12O18(OH)12](OH)6Cl4·4H2OTrig. 3m (3 2/m) : R3m
6.H0.20IquiqueiteK3Na4Mg(CrO4)B24O39(OH) · 12H2OHex.
6.H0.35HalurgiteMg2[B4O7]2 · 5H2OMon.
6.H0.40EkateriniteCa2(B4O7)(Cl,OH)2 · 2H2OHex.
6.H0.45VitimiteCa6[(OH)14|SO4|B14O19] · 5H2OMon.
6.H0.50CanavesiteMg2(HBO3)(CO3) · 5H2OMon.
6.H0.55QilianshaniteNaHCO3 · H3BO3 · 2H2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.3.1CalciboriteCa(B2O4)Orth.
9.3.2SibirskiteCa2(HB2O5)(OH)Mon.
9.3.3FabianiteCaB3O5OHMon. 2/m : P21/b
9.3.4UralboriteCa2[B3O3(OH)5 · OB(OH)3]Mon.
9.3.5VimsiteCaB2O2(OH)4Mon.
9.3.6OlshanskyiteCa2[B3O3(OH)6](OH) · 3H2O
9.3.7FroloviteCa[B(OH)4]2Tric.
9.3.8KorzhinskiteCa(B2O4) · H2O
9.3.9TyretskiteCa2B5O9OH · H2OTric.
9.3.10NifontoviteCa3B6O6(OH)12(H2O)2Mon.
9.3.12InyoiteCa(H4B3O7)(OH) · 4H2OMon. 2/m
9.3.13GoweriteCa[B5O8(OH)][B(OH)3] · 3H2OMon.
9.3.14ColemaniteCa[B3O4(OH)3] · H2OMon. 2/m : P21/b
9.3.15PentahydroboriteCaB2O(OH)6 · 2H2OTric.
9.3.16HexahydroboriteCa[B(OH)4]2 · 2H2O or CaB2O4 · 6H2OMon. 2/m : B2/b
9.3.17MeyerhofferiteCa2(H3B3O7)2 · 4H2OTric. 1 : P1
9.3.18PriceiteCa2B5O7(OH)5 · H2OMon. 2/m : P21/b
9.3.19GinoriteCa2B14O20(OH)6 · 5H2OMon.
9.3.20ProbertiteNaCaB5O7(OH)4 · 3H2OMon. 2/m
9.3.21UlexiteNaCa[B5O6(OH)6] · 5H2OTric. 1 : P1
9.3.22HydroboraciteCaMg[B3O4(OH)3]2 · 3H2OMon.
9.3.23InderboriteCaMg(H3B3O7)2 · 8H2OMon. 2/m
9.3.25HenmiliteCa2Cu[B(OH)4]2(OH)4Tric.
9.3.26StrontioboriteSrB8O11(OH)4Mon.
9.3.27VeatchiteSr2B11O16(OH)5 · H2OMon. m : Bb
9.3.28Veatchite-ASr2B11O16(OH)5 · H2OTric.
9.3.29 P-VeatchiteSr2B11O16(OH)5 · H2O
9.3.30 BalavinskiteSr2B6O11 · 4H2O
9.3.31TunelliteSrB6O9(OH)2 · 3H2OMon. 2/m : P21/b
9.3.32StrontioginoriteCaSrB14O20(OH)6 · 5H2OMon. 2/m : P21/b

Fluorescence of WardsmithiteHide

Other InformationHide

Notes:
insoluble in methyl alcohol, is very slightly soluble in cold water, slightly soluble in hot water, and readily soluble in cold dilute acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for WardsmithiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Erd, R.C., J.F. McAllister & A.C. Vlisidis (1970) Wardsmithite 5CaO•MgO•12B2O3•30H2O, a new borate mineral from the Death Valley region, California: American Mineralogist: 55: 349-357.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for WardsmithiteHide

Localities for WardsmithiteHide

ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Mexico
 
Miranda-Gasca, M. A., Gomez-Caballero, J. A., & Eastoe, C. J. (1998). Borate deposits of northern Sonora, Mexico; stratigraphy, tectonics, stable isotopes, and fluid inclusions. Economic Geology, 93(4), 510-523.
USA (TL)
 
  • California
    • Inyo Co.
      • Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area)
        • Ryan
Erd, R.C., J.F. McAllister, and A.C. Vlisidis (1970) Wardsmithite 5CaO • MgO •12B2O3 •30H2O, a new borate mineral from the Death Valley region, California. American Mineralogist: 55: 349-357; www.mineralsocal.org.
Erd, R.C., J.F. McAllister, and A.C. Vlisidis (1970) Wardsmithite 5CaO • MgO •12B2O3 •30H2O, a new borate mineral from the Death Valley region, California. American Mineralogist: 55: 349-357; McAllister, James Franklin (1970) Geology of the Furnace Creek borate area, Death Valley, Inyo County, California. California Division of Mines and Geology Map Sheet 14, 9 pp.; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 241 & 243.
        • Twenty Mule Team Canyon
Am Min 64:3-4 pp 369-375; Erd, R.C., J.F. McAllister, and G.D. Eberlein (1979) New data on hungchaoite, the second world occurrence, Death Valley region, California. American Mineralogist: 64: 369-375.
    • Kern Co.
      • Kramer District (Kramer Borate District)
        • Boron
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 243.
Mineral and/or Locality  
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