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Hydroboracite

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Formula:
CaMg[B3O4(OH)3]2 · 3H2O
System:
Monoclinic
Colour:
Colourless, white
Hardness:
2
Name:
In allusion to the composition, being a HYDRated BORAte.
This page provides mineralogical data about Hydroboracite.

Classification of Hydroboracite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
6.CB.15

6 : BORATES
C : Triborates
B : Ino-triborates
26.3.6.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
3 : Triborates
9.3.22

9 : Borates
3 : Borates of Ca and Sr
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Type Occurrence of Hydroboracite

Year of Discovery:
1834
Geological Setting of Type Material:
The original description of the type locality is the Caucasus. The original location has not been found.

Physical Properties of Hydroboracite

Vitreous, Silky
Diaphaneity (Transparency):
Transparent
Colour:
Colourless, white
Hardness (Mohs):
2

Crystallography of Hydroboracite

Crystal System:
Monoclinic
Cell Parameters:
a = 11.76Å, b = 6.68Å, c = 8.23Å
β = 102.59°
Ratio:
a:b:c = 1.76 : 1 : 1.232
Unit Cell Volume:
V 630.98 ų (Calculated from Unit Cell)
Morphology:
Crystals elongated [001] and flattened {010}. Lamellar-fibrous radiating or columnar. Compact and fine-grained.

Optical Data of Hydroboracite

Type:
Biaxial (+)
RI values:
nα = 1.520 - 1.523 nβ = 1.534 - 1.535 nγ = 1.569 - 1.571
2V:
Measured: 60° to 66°, Calculated: 62° to 66°
Max Birefringence:
δ = 0.049
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
relatively weak

Chemical Properties of Hydroboracite

Formula:
CaMg[B3O4(OH)3]2 · 3H2O
Essential elements:
All elements listed in formula:

Relationship of Hydroboracite to other Species

6.CB.10ColemaniteCa[B3O4(OH)3] · H2O
6.CB.20HowliteCa2B5SiO9(OH)5
6.CB.25JarandoliteCa[B3O4(OH)3]
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
9.3.6OlshanskyiteCa3[B(OH)4]4(OH)2
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
9.3.13GoweriteCa[B5O8(OH)][B(OH)3] · 3H2O
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
9.3.23InderboriteCaMg(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 Hydroboracite

Name in Other Languages:
Simplified Chinese:水方硼石
Traditional Chinese:水方硼石

Other Information

Other Information:
Virtually insoluble in cold water. Partially dissolved by prolonged submersion in boiling water.
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 Hydroboracite

Reference List:
Hess (1834) Annalen der Physik, Halle, Leipzig: 31: 49.

Lottner (1865) Zeitschrift der Deutsche geologische Gesellschaft, Berlin: 17: 430.

Erdmann (1907) Chemie und Industrie der Kalisalze, Berlin: 12.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 88.

Schaller (1928) Festsch. Goldschmidt, Heidelberg: 256.

Boldyreva (1936) Mater. Cent. Sc. Geol. Prosp. Inst., no. 1: 62 (Min. Abs. (1936): 6: 336.

Boldyreva in Godlevsky (1937) Mineralogicheskoe Obshchestvo, Leningrad, Zapiski: 66: 315; ...(abstract) Min. Abs.: 7: 122.

Boky (1937) Bull. ac. sc. U.R.S.S., Cl. sc. mat. nat., Ser. chim.: 871;...(abstrat) Min. Abs.: 7: 123.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 353-355.

C. Sabelli and A. Stoppioni (1978): Refinement of the crystal structure of hydroboracite. Canadian Mineralogist 16, 75-80.

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

Internet Links for Hydroboracite

Specimens:
The following Hydroboracite specimens are currently listed for sale on minfind.com.

Localities for Hydroboracite

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
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.
    • Salar Del Hombre Muerto
    • Sijes
www.sijes.com.ar
www.sijes.com.ar
www.sijes.com.ar
Alonso, R. N. (1999). On the origin of La Puna borates. Acta geológica hispánica, 34(2), 141-166.; 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.
http://www.irocks.com/Inyoite.html
Garrett, D.E. (1998): Borates - Handbook of Deposits, Processing, Properties and Use. Academic Press (San Diego, London), 475 pp.; Alonso, R. N. (1999). On the origin of La Puna borates. Acta geológica hispánica, 34(2), 141-166.; 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.
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.
www.sijes.com.ar
Azerbaijan
 
  • Qobustan District (Gobustan; Kobustan)
    • Caspian Sea
Novgorodova M.I., Mamedov Yu.G.. Native aluminium from mud volcano at the Bulla island (caspian Sea), - Lithology and Mineral Resourses,1996,N4,p. 339-349
Canada
 
  • New Brunswick
    • Kings Co.
      • Cardwell Parish
        • Penobsquis
Canadian Mineralogist (2002): 40: 1675-1686.; Canadian Mineralogist (1996): 34: 881-892
      • Hammond Parish
        • Salt Springs evaporite deposit
BURNS, P.C., HAWTHORNE, F.C. & STIRLING, J.A.R. (1992): Trembathite, (Mg,Fe)3B7O13Cl, a new borate mineral from the Salt Springs potash deposit, Sussex, New Brunswick. Canadian Mineralogist 30, 445-448.
      • Studholm Parish
Canadian Mineralogist: 43: 1469-1487.
China
 
  • Qinghai Province
    • Haixi Autonomous Prefecture
      • Da Qaidam Co. (Dachaidan Co.)
Keqin Cai and Ziqiang Qian (1982): Acta Mineralogica Sinica 2(4), 290-295; Shaoxiu Yang (1991): Journal of Lake Sciences 3(1), 1-10; Garrett, D.E. (1998): Borates: Handbook of deposits, processing, properties, and use. Academic Press (San Diego, London), 491 pp.; Qingzhong Wang, Yingkai Xiao, Chonggeng Zhang, Haizhen Wei, and Zhiqi Zhao (2001): Bulletin of Mineralogy, Petrology and Geochemistry 20(4), 344-366
Germany
 
  • Saxony-Anhalt
    • Stassfurt Potash deposit
      • Egeln
        • Tarthun
No reference listed
  • Thuringia
    • Harz
      • Nordhausen
        • Niedersachswerfen
Siemroth, J. (2008): Das Vorkommen von Boratmineralien im Werra-Anhydrit des Steinbruchs Kohnstein bei Niedersachswerfen am Südharz, Der Aufschluss, Vol. 59, 353-366
        • Woffleben
W. Fischer & M. Lischke (1981): Hydroboracit von Woffleben, eine vorläufige Fundbeschreibung. Fundgrube 1/1981, 28-29.
Iran
 
  • Zanjan Province
    • Dandy District
M Nazari collection
Kazakhstan
 
  • Aktobe Province (Aqtöbe Oblysy; Aktubinskaya Oblast')
    • Aksai Valley
  • Atyrau Province (Atyrau Oblysy; Atyrau Oblast')
    • Atyrau (Gur'yev)
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Evseev, A. A. (1995) Kazaknstan and Middle Asia. A brief Mineralogical Guide. World of Stone 8:24-30; Pekov, I. V. & Abramov, D. V. (1993): Boron deposit of the Inder and its minerals. World of Stones, 1, 23-30.
        • Mt Kzyl-tau
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
Turkey
 
  • Aegean Region
    • Kütahya Province
      • Emet
        • Doğanlar village
J. García-Veigas, L. Rosell, X. Alcobé, I. Subias, F. Ortí, I. Gündogan and C. Helvaci (2010) Fontarnauite, a New Sulphate-Borate Mineral from the Emet Borate District (Turkey). Macla 13, 97-98.
        • Emet Borate deposit
American Mineralogist; April 1979; v. 64; no. 3-4; p. 362-366
CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, Vol. 9, 2000, pp. 1-27; American Mineralogist; April 1979; v. 64; no. 3-4; p. 362-366
  • Central Anatolia Region
    • Eskişehir Province
      • Kirka
García-Veigas, J., & Helvacı, C. (2013). Mineralogy and sedimentology of the Miocene Göcenoluk borate deposit, Kırka district, western Anatolia, Turkey. Sedimentary Geology, 290, 85-96.
CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, Vol. 9, 2000, pp. 1-27
  • Marmara Region
    • Balikesir Province
Kistler, R. B., & Helvaci, C. (1994). Boron and borates. Industrial minerals and rocks, 6, 171-186.
Mining Annual Review(1985):128.
    • Bursa Province
      • Mustafa Kemalpafla
CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, Vol. 9, 2000, pp. 1-27; Helvaci, C. (1994). Mineral assemblages and formation of the Kestelek and Sultancayir borate deposits. Proc. 29th Intl. Geol. Congr. Part A, 245-284.; Helvaci, C., Mordogan, H., Çolak, M., & Gündogan, I. (2004). Presence and distribution of lithium in borate deposits and some recent lake waters of west-central Turkey. International Geology Review, 46(2), 177-190.
USA
 
  • California
    • Inyo Co.
      • Amargosa Range
        • Black Mts
          • Monte Blanco
www.mineralsocal.org
      • Amargosa Valley
Countryman, R.L. (1977): Hydroboracite from the Amargosa desert, eastern California. Mineralogical Record 8, 503-504; Pemberton, H. Earl (1978) Hydroboracite from the Furnace Creek formation. Mineralogical Record: 9: 379-381; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 240; www.mineralsocal.org.
      • Death Valley
Econ Geol (1996) 91:622-635
      • Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area)
Foshag, William Frederick (1924a), Famous mineral localities: Furnace Creek, Death Valley, California: American Mineralogist: 9: 9; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 240.
Foshag, William Frederick (1924a), Famous mineral localities: Furnace Creek, Death Valley, California: American Mineralogist: 9: 8-10; Schaller, Waldemar Theodore (1928), Hydroboracite from California Festschrift Victor Goldschmidt: 256-262, Heidelberg: 256; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 221.
Countryman, R.I. (1977), Hydroboracite from the Amargosa Desert, eastern California: Mineralogical Record: 8: 503-504; Pemberton, H. Earl (1978) Hydroboracite from the Furnace Creek formation. Mineralogical Record: 9: 379-381.; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 240, 255; Nevada Bureau of Mines and Geology Report 26, "Guidebook: Las Vegas to Death Valley and Return," Mackay School of Mines, University of Nevada - Reno, 1976.; Collected it in the mine-Rock Currier
Rock Currier, Collected them in the mine.; Rock Currier
        • Twenty Mule Team Canyon
Erd, R.C., J.F. McAllister & H. Almond (1959), Gowerite, a new hydrous calcium borate from Death Valley, California: American Mineralogist: 44: 911-919.
      • Greenwater Range
Countryman, R.I. (1977), Hydroboracite from the Amargosa Desert, eastern California: Min. Rec.: 8: 503; Pemberton, H. Earl (1978) Hydroboracite from the Furnace Creek formation. Mineralogical Record: 9: 246, 379-381; Pemberton, H. Earl (1983), Minerals of California: 240-241.
    • Kern Co.
      • Kramer District
www.mineralsocal.org
Pemberton, H. Earl, Wm. Moller, Jack Schwartz & George Masimer (1960), The minerals of Boron, California, 40 pp. (Published by the Mineral Research Soc. of California, Montebello, CA): 29; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 221; Cal Div of Mines & Geology "Mineral Information Service" V. 22 N. 9 Sept 1969
Morgan, V. and Erd, R.C. (1969) Minerals of the Kramer borate district, California California Division of Mines and Geology Mineral Information Service: 22: 152; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 241.
    • Ventura Co.
      • San Emigdio Mts
        • Ventura County Borate District (Stauffer District)
          • Lake of the Woods area
            • Lockwood Valley
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 221.
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