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Gowerite

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About GoweriteHide

Formula:
Ca[B5O8(OH)][B(OH)3] · 3H2O
Colour:
Colorless, white
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
2.00
Crystal System:
Monoclinic
Name:
In honor of Harrison Preston Gower (4 November 1890 – 18 March 1967), Mining Manager, U.S. Borax and Chemical Company, for his assistance to scientific studies of Death Valley borate deposits.
This page provides mineralogical data about Gowerite.


Classification of GoweriteHide

Approved
First Published:
1959
6.EC.10

6 : BORATES
E : Pentaborates
C : Phyllo-pentaborates
26.5.8.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
5 : Pentaborates
9.3.13

9 : Borates
3 : Borates of Ca and Sr

Physical Properties of GoweriteHide

Vitreous
Transparency:
Transparent
Colour:
Colorless, white
Streak:
White
Hardness:
Tenacity:
Brittle
Cleavage:
Distinct/Good
Fracture:
Irregular/Uneven
Density:
2.00(1) g/cm3 (Measured)    

Optical Data of GoweriteHide

Type:
Biaxial (+)
RI values:
nα = 1.484 nβ = 1.501 nγ = 1.550
Max Birefringence:
δ = 0.066
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r > v to r < v strong
Pleochroism:
Non-pleochroic

Chemical Properties of GoweriteHide

Formula:
Ca[B5O8(OH)][B(OH)3] · 3H2O

Crystallography of GoweriteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 11.03 Å, b = 16.4 Å, c = 6.57 Å
β = 90.93°
Ratio:
a:b:c = 0.673 : 1 : 0.401
Unit Cell V:
1,188.30 ų (Calculated from Unit Cell)

Type Occurrence of GoweriteHide

Reference:
Erd, R.C., McAllister, J.F., Almond, H. (1959) Gowerite, a new hydrous calcium borate, from the Death Valley region, California. American Mineralogist: 44: 911-919.

Other Language Names for GoweriteHide

German:Gowerit
Spanish:Gowerita

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Gowerite associated with McallisteriteMg2[B6O7(OH)6]2 · 9H2O
1 photo of Gowerite associated with ColemaniteCa[B3O4(OH)3] · H2O
1 photo of Gowerite associated with NobleiteCaB6O9(OH)2 · 3H2O

Related Minerals - Nickel-Strunz GroupingHide

6.EC.05BiringucciteNa2B5O8(OH) · H2OMon.
6.EC.05NasiniteNa2[B5O8(OH)] · 2H2OOrth.
6.EC.15P-VeatchiteSr2B11O16(OH)5 · H2O
6.EC.15VeatchiteSr2B11O16(OH)5 · H2OMon. m : Bb
6.EC.20VolkovskiteKCa4[B5O8OH]4[B(OH)3]2Cl · 4H2OTric. 1 : P1
6.EC.25TuzlaiteNaCaB5O8(OH)2 · 3H2OMon. 2/m : P21/b
6.EC.30HeidorniteNa2Ca3B5O8(SO4)2Cl(OH)2Mon.
6.EC.35BrianroulstoniteCa3[B5O6(OH)6](OH)Cl2 · 8H2OMon.

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) · 3H2OTric.
9.3.7FroloviteCa[B(OH)4]2Tric.
9.3.8KorzhinskiteCa(B2O4) · H2OMon. 2/m : P2/m
9.3.9TyretskiteCa2B5O9OH · H2OTric.
9.3.10NifontoviteCa3B6O6(OH)12(H2O)2Mon.
9.3.12InyoiteCa(H4B3O7)(OH) · 4H2OMon. 2/m
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
9.3.24WardsmithiteCa5Mg[B4O7]6 · 30H2OHex.
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 GoweriteHide

Not fluorescent

Other InformationHide

IR Spectrum:
Death Valley material [cm-1]: 3325, 3210sh, 3010sh, 1620sh, 1450sh, 1415s, 1355s, 1258s, 1116, 1045sh, 1021s, 977s, 965s, 912, 861, 837w, 763, 732w, 707w, 679w, 661w, 635w, 602w, 497w, 478w, 456w
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 GoweriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Erd, R.C., McAllister, J.F., Almond, H. (1959) Gowerite, a new hydrous calcium borate, from the Death Valley region, California. American Mineralogist: 44: 911-919.
Fleischer, M. (1960) New mineral names. American Mineralogist: 45: 753-756.
International Mineralogical Association (1962) International Mineralogical Association: Commission on new minerals and mineral names. Mineralogical Magazine: 33: 260-263.
Konnert, J.A., Clark, J.R., Christ, C.L. (1972) Gowerite, CaB5O8(OH)·B(OH)3·3H2O: crystal structure and comparison with related borates. American Mineralogist: 57: 381-396.
International Mineralogical Association (1962) Commission on New Minerals and Mineral Names. Mineralogical Magazine: 33: 260-263.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Chukanov, N.V. (2014) Infrared spectra of mineral species: Extended library. Springer (Springer Geochemistry/Mineralogy), vol. 1, Dordrecht, 1726 pp.

Internet Links for GoweriteHide

Localities for GoweriteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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.
Argentina
 
  • Salta Province
    • Los Andes department
      • Sijes
Galliski, M.A., Cooper, M.A., Márquez-Zavalía, M.F., and Hawthorne, F.C. (2010) Alfredstelznerite: a new calcium borate hydrate from Santa Rosa mine, Salta, northwestern Argentina. Canadian Mineralogist, 48, 123-128; CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, 9:1-27.
South Africa
 
  • Northern Cape
    • Kalahari manganese field
      • Hotazel
Minerals of South Africa
      • Kuruman
        • N'Chwaning Mines
[Von Bezing, K. L. et al. (1991) - The Kalahari (Afrique du Sud) manganese field : an update, Mineralogical Record, 22 (3), 279-302.]
Minerals of South Africa
USA
 
  • California
    • Inyo Co.
      • Amargosa Range
        • Black Mountains
          • Zabriskie Point
www.mineralsocal.org
      • Furnace Creek Mining District (Furnace Creek Borate Mining District)
        • Ryan
Erd, R.C., J.F. McAllister & H. Almond (1959), Gowerite, a new hydrous calcium borate from Death Valley, California: American Mineralogist: 44: 912; Christ, C.L. & J.R. Clark (1960), X-ray crystallography and crystal chemistry of gowerite, CaO-3B2O3-5H2O: American Mineralogist: 45: 230-234; Konnert, J.A., Clark, J.R., and Christ, C.L. (1972) Gowerite, CaB5O8(OH) •B(OH)3•3H2O: crystal structure and comparison with related borates. American Mineralogist: 57: 381-396; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 252.
Erd, R.C., J.F. McAllister & H. Almond (1959), Gowerite, a new hydrous calcium borate from Death Valley, California: American Mineralogist: 44: 911-919; 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.
Am Min (1959) 44:911-919
American Mineralogist (1959): 44: 911-919.
        • Twenty Mule Team Canyon
American Mineralogist (1979): 64(3-4): 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.
Erd, R.C., J.F. McAllister & H. Almond (1959), Gowerite, a new hydrous calcium borate from Death Valley, California: American Mineralogist: 44: 912; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 205.
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.
Erd, R.C., J.F. McAllister & H. Almond (1959), Gowerite, a new hydrous calcium borate from Death Valley, California: American Mineralogist: 44: 912; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 206.
 
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