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Gowerite

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Formula:
Ca[B5O8(OH)][B(OH)3] · 3H2O
System:
Monoclinic
Hardness:
3
Name:
In honor of Harrison Preston Gower (1890–1967), 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 Gowerite

Approved
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
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Type Occurrence of Gowerite

Year of Discovery:
1959

Physical Properties of Gowerite

Hardness (Mohs):
3

Crystallography of Gowerite

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

Optical Data of Gowerite

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

Chemical Properties of Gowerite

Formula:
Ca[B5O8(OH)][B(OH)3] · 3H2O
Essential elements:
All elements listed in formula:

Relationship of Gowerite to other Species

6.EC.05BiringucciteNa2B5O8(OH) · H2O
6.EC.05NasiniteNa2[B5O8(OH)] · 2H2O
6.EC.15P-Veatchite
6.EC.15VeatchiteSr2B11O16(OH)5 · H2O
6.EC.20VolkovskiteKCa4[B5O8OH]4[B(OH)3]2Cl · 4H2O
6.EC.25TuzlaiteNaCaB5O8(OH)2 · 3H2O
6.EC.30HeidorniteNa2Ca3B5O8(SO4)2Cl(OH)2
6.EC.35BrianroulstoniteCa3[B5O6(OH)6](OH)Cl2 · 8H2O
9.3.1CalciboriteCa(B2O4)
9.3.2SibirskiteCa2(HB2O5)(OH)
9.3.3FabianiteCaB3O5OH
9.3.4UralboriteCa2[B3O3(OH)5 · OB(OH)3]
9.3.5VimsiteCaB2O2(OH)4
9.3.6OlshanskyiteCa2[B3O3(OH)6](OH) · 3H2O
9.3.7FroloviteCa[B(OH)4]2
9.3.8KorzhinskiteCa(B2O4) · H2O
9.3.9TyretskiteCa2B5O9OH · H2O
9.3.10NifontoviteCa3B6O6(OH)12(H2O)2
9.3.12InyoiteCa(H4B3O7)(OH) · 4H2O
9.3.14ColemaniteCa[B3O4(OH)3] · H2O
9.3.15PentahydroboriteCaB2O(OH)6 · 2H2O
9.3.16HexahydroboriteCa[B(OH)4]2 · 6H2O
9.3.17MeyerhofferiteCa2(H3B3O7)2 · 4H2O
9.3.18PriceiteCa2B5O7(OH)5 · H2O
9.3.19GinoriteCa2B14O23 · 8H2O
9.3.20ProbertiteNaCaB5O7(OH)4 · 3H2O
9.3.21UlexiteNaCa[B5O6(OH)6] · 5H2O
9.3.22HydroboraciteCaMg[B3O4(OH)3]2 · 3H2O
9.3.23InderboriteCaMg(H3B3O7)2 · 8H2O
9.3.24WardsmithiteCa5Mg[B4O7]6 · 30H2O
9.3.25HenmiliteCa2Cu[B(OH)4]2(OH)4
9.3.26StrontioboriteSrB8O11(OH)4
9.3.27VeatchiteSr2B11O16(OH)5 · H2O
9.3.28Veatchite-ASr2B11O16(OH)5 · H2O
9.3.29 P-Veatchite
9.3.30 BalavinskiteSr2B6O11 · 4H2O
9.3.31TunelliteSrB6O9(OH)2 · 3H2O
9.3.32Strontioginorite(Sr,Ca)2B14O23 · 8H2O

Other Names for Gowerite

Name in Other Languages:
German:Gowerit
Spanish:Gowerita

Other Information

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 Gowerite

Reference List:
American Mineralogist (1959): 44: 911-919.

American Mineralogist (1960): 45: 230.

Konnert, J.A., J.R. Clark & C.L. Christ (1972), Gowerite, CaB5O8(OH)•B(OH)3•3H2O: crystal structure and comparison with related borates: American Mineralogist: 57: 381-396.

Mineralogical Magazine (1962): 33: 260.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Gowerite

Localities for Gowerite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Argentina
 
  • Salta
    • 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 Province
    • 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 Mts
          • Zabriskie Point
www.mineralsocal.org
      • Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area)
        • 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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