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Tincalconite

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Formula:
Na2(B4O7) · 5H2O
Colour:
White, colourless (artificial material); colourless in transmitted light.
Lustre:
Vitreous, Dull
Hardness:
2
Specific Gravity:
1.88
Crystal System:
Trigonal
Name:
From "tincal", a Sanskrit name for borax, plus Greek κουία, "konis", powder, alluding to its composition and typical pulverulent occurrence. Pabst and Sawyer write that the name is first appears in 1878 in a list of journal extracts (and attributed to Shepard), but that the original reference is not given and is not known to exist.
Tincalconite-Borax Group.
Typically forms as a dehydration product (white, powdery) of other borates (e.g., borax).


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Classification of TincalconiteHide

Approved, 'Grandfathered' (first described prior to 1959)
6.DA.15

6 : BORATES
D : Tetraborates
A : Neso-tetraborates
26.4.2.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
4 : Tetraborates
9.1.8

9 : Borates
1 : Borates of the alkalis and boric acid

Physical Properties of TincalconiteHide

Vitreous, Dull
Transparency:
Transparent, Translucent
Colour:
White, colourless (artificial material); colourless in transmitted light.
Hardness:
Fracture:
Hackly
Density:
1.88 g/cm3 (Measured)    1.894 g/cm3 (Calculated)

Optical Data of TincalconiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.461 nε = 1.474
Max Birefringence:
δ = 0.013
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of TincalconiteHide

Formula:
Na2(B4O7) · 5H2O
IMA Formula:
Na2B4O5(OH)4 · 3H2O

Crystallography of TincalconiteHide

Crystal System:
Trigonal
Class (H-M):
3 2 - Trapezohedral
Space Group:
R3 2
Cell Parameters:
a = 11.097(2) Å, c = 21.114(4) Å
Ratio:
a:c = 1 : 1.903
Unit Cell V:
2,251.71 ų (Calculated from Unit Cell)
Z:
9
Morphology:
Fine-grained powder. Artificial crystals pseudo-cubic with equal development of the commonest forms "r" and "c," yielding an octahedron-like habit.

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Type Occurrence of TincalconiteHide

Geological Setting of Type Material:
Metamorphosed bedded borate deposit in clay-shales.
Associated Minerals at Type Locality:

Synonyms of TincalconiteHide

Other Language Names for TincalconiteHide

Simplified Chinese:三方硼砂
Spanish:Tincalconita
Traditional Chinese:三方硼砂

Common AssociatesHide

Associated Minerals Based on Photo Data:
Borax13 photos of Tincalconite associated with Borax on mindat.org.
Hanksite5 photos of Tincalconite associated with Hanksite on mindat.org.
Kernite3 photos of Tincalconite associated with Kernite on mindat.org.
Gypsum2 photos of Tincalconite associated with Gypsum on mindat.org.
Ezcurrite1 photo of Tincalconite associated with Ezcurrite on mindat.org.
Realgar1 photo of Tincalconite associated with Realgar on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

6.DA.10BoraxNa2(B4O5)(OH)4 · 8H2OMon. 2/m : B2/b
6.DA.20HungchaoiteMg(B4O7) · 9H2OTric. 1
6.DA.25FedorovskiteCa2Mg2B4O7(OH)6Orth. mmm (2/m 2/m 2/m) : Pbam
6.DA.25RoweiteCa2Mn2+2B4O7(OH)6Orth.
6.DA.30HydrochlorboriteCa4B8O15Cl2 · 21H2OMon.
6.DA.35UralboriteCa2[B3O3(OH)5 · OB(OH)3]Mon.
6.DA.40BorcariteCa4Mg(B4O6(OH)6)(CO3)2Tric.
6.DA.40NumanoiteCa4Cu(B4O6(OH)6)(CO3)2Mon. 2/m : B2/m
6.DA.60Fontarnauite(Na,K)2(Sr,Ca) (SO4)[B5O8(OH)]·2H2OMon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.1.1SassoliteH3BO3Tric. 1 : P1
9.1.2MetaboriteHBO2Iso.
9.1.3DiomigniteLi2[B4O7]Tet.
9.1.4BiringucciteNa2B5O8(OH) · H2OMon.
9.1.5NasiniteNa2[B5O8(OH)] · 2H2OOrth.
9.1.6KerniteNa2[B4O6(OH)2] · 3H2OMon. 2/m : P2/b
9.1.7EzcurriteNa4B10O17 · 7H2OTric. 1 : P1
9.1.9BoraxNa2(B4O5)(OH)4 · 8H2OMon. 2/m : B2/b
9.1.10AmeghiniteNa(H4B3O7)Mon.
9.1.11SborgiteNa[B5O6(OH)4] · 3H2OMon.
9.1.12AristarainiteNa2MgB12O20 · 8H2OMon. 2/m : P21/b
9.1.13SantiteK[B5O6(OH)4] · 2H2OOrth.
9.1.14Larderellite(NH4)B5O7(OH)2 · H2OMon.
9.1.15Ammonioborite(NH4)2[B5O6(OH)4]2 · H2OMon. 2/m : B2/b
9.1.16Rhodizite(K,Cs)Al4Be4(B,Be)12O28Iso. 4 3m : P4 3m

Other InformationHide

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 TincalconiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Payen (1827) Journal chim. méd.: 3: 594 (as Octahedral borax).
Arzruni A. (1876) Ueber den sogenannten "octaedrischen" borax. Annalen der Physik, Halle, Leipzig: 158: 250-252.
Shepard, C.U. (1878) Extraits de diverses publications. Tincalconite. Bulletin de la Société Minéralogique de France: 1: 144-144.
Schaller, W.T. (1930) Borate minerals from the Kramer district, Mohave Desert, California. USGS Professional Paper 158: 137-170.
Schaller, W.T. (1934) Mineralogical Magazine: 23: 634 (as Mohavite).
Minder (1935) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 92: 301.
Pabst, A., Sawyer, D.L. (1948) Tincalconite crystals from Searles Lake, San Bernardino County, California. American Mineralogist: 33: 472-481.
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: 337-339.
Giacovazzo, C., Menchetti, S., Scordari, F. (1973) The crystal structure of tincalconite. American Mineralogist: 58: 523-530.
Powell, D.R., Gaines, D.F., Zerella, P.J., Smith, R.A. (1991) Refinement of the structure of tincalconite. Acta Crystallographica: C47: 2279-2282.
Grew, E.S., Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Luck, R.L., Wang, G. (2002) On the nature of tincalconite. American Mineralogist: 87: 350-354.
Anthony, J.W., Bideaux, R.A., Bladh, K.W., Nichols, M.C. (2003) Handbook of Mineralogy, Volume V. Borates, Carbonates, Sulfates. Mineral Data Publishing, Tucson, AZ, 813 pp.: 707.
Sevim, F., Küçükarslan, H., Demir, F., Eroglu, H., Aktan, M. (2014) Dehydration kinetics of tincalconite from thermogravimetric data. Journal of The Chemical Society of Pakistan: 36(2): 227-231.

Internet Links for TincalconiteHide

Localities for TincalconiteHide

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
 
  • Jujuy
    • Susques Department
      • Coranzuli
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.
  • Salta
    • Los Andes department
      • Salar del Hombre Muerto
Bull. Soc. Franç. Minéralo. Cristallo. , 1974, 97, p. 497.; Am Min 58:308-313; 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.
China
 
  • Qinghai Province
    • Haixi Autonomous Prefecture
      • Da Qaidam Co. (Dachaidan Co.)
Dapeng Sun, Zhanghong Gao, and Kejun Wang (1984): Acta Sedimentologica Sinica 2(4)
      • Delhi Co. (Delingha Co.)
        • Yashatu
Shiqing Luo, Jian'an Lu, Liben Wang, and Jingqing Zhu (1993): Acta Mineralogica Sinica 13(2), 97-101
  • Tibet Autonomous Region
    • Nagchu Prefecture (Naqu Prefecture)
      • Baingoin Co. (Bange Co.)
Xiyu Zheng and Shengsong Yu (1981): Scientia Geographica Sinica 1(1), 66-76; Shaoxiu Yang (1991): Journal of Lake Sciences 3(1), 1-10; Qingzhong Wang, Yingkai Xiao, Chonggeng Zhang, Haizhen Wei, and Zhiqi Zhao (2001): Bulletin of Mineralogy, Petrology and Geochemistry 20(4), 344-366
      • Nyima Co. (Nima Co.)
Qingzhong Wang, Yingkai Xiao, Chonggeng Zhang, Haizhen Wei, and Zhiqi Zhao (2001): Bulletin of Mineralogy, Petrology and Geochemistry 20(4), 344-366; Xifang Liu and Mianping Zheng (2010): Acta Geologica Sinica 89(11), 1601-1612
Xiyu Zheng and Shengsong Yu (1981): Scientia Geographica Sinica 1(1), 66-76; Shaoxiu Yang (1991): Journal of Lake Sciences 3(1), 1-10
    • Ngari Prefecture
      • Gê'gyai Co. (Geji Co.)
Xiyu Zheng and Shengsong Yu (1981): Scientia Geographica Sinica 1(1), 66-76; Shaoxiu Yang (1991): Journal of Lake Sciences 3(1), 1-10
Shaoxiu Yang (1991): Journal of Lake Sciences 3(1), 1-10
Italy
 
  • Tuscany
    • Pisa Province
      • Pomarance
Quagliarella Asciano F., Vurro F. (1973) - Tincalconite di Larderello - Per. Min. Roma, 42, 3, pp. 583-589
Turkey
 
  • Central Anatolia Region
    • Eskişehir Province
      • Kirka
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
Ukraine
 
  • Crimea Oblast'
World of Stones v.9
      • Kerch peninsula (Kertch peninsula)
        • Bondarenkovo Village area
Deyak M.A. Modern water-chemogenic formations of mud volcanoes of Kerch Peninsula. Dissertation to Scientific Candidate Degree in Geological Sciences in speciality 04.00.21 – lithology. –Department of marine geology and sedimentary ore formation of the National Academy of Sciences of Ukraine. – Kyiv, 2010.
        • Novoselovka Village area
Deyak M.A. Modern water-chemogenic formations of mud volcanoes of Kerch Peninsula. Dissertation to Scientific Candidate Degree in Geological Sciences in speciality 04.00.21 – lithology. –Department of marine geology and sedimentary ore formation of the National Academy of Sciences of Ukraine. – Kyiv, 2010.
        • Vulcanovka Village area
Deyak M.A. Modern water-chemogenic formations of mud volcanoes of Kerch Peninsula. Dissertation to Scientific Candidate Degree in Geological Sciences in speciality 04.00.21 – lithology. –Department of marine geology and sedimentary ore formation of the National Academy of Sciences of Ukraine. – Kyiv, 2010.
USA
 
  • California
    • Inyo Co.
Ericksen, G. E., Hosterman, J. W., & Amand, P. S. (1988). Chemistry, mineralogy and origin of the clay-hill nitrate deposits, Amargosa River valley, Death Valley region, California, USA. Chemical geology, 67(1-2), 85-102.
USGS
Econ Geol (1996) 91:622-635
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.: 9; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 238.
    • Kern Co.
      • Kramer District (Kramer Borate District)
[www.johnbetts-fineminerals.com]
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
V. King
Frondel C, Morgan V (1956) Inderite and gerstleyite from the Kramer borate district, Kern County, California. American Mineralogist 41, 839-843
Am Min (1958) 43:169-170
Have collected them in the mine-Rock Currier
    • Lake Co.
      • Sulphur Creek District (Sulfur Creek District; Wilbur Springs District)
        • Clear Lake Oaks
Pabst, A., & Sawyer, D. L. (1948). Tincalconite crystals from Searles Lake, San Bernardino County, California. American Mineralogist, 33, 472-481.
    • Los Angeles Co.
      • Lang
        • Tick Canyon
          • Tick Canyon Borate deposit
Masimer, G.E. (1966) Tick Canyon revisited. Gems and Minerals: 347: 20-23; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 261; www.mineralsocal.org.
    • San Bernardino Co.
Pabst, Adolf & Dwight L. Sawyer, Jr. (1948), Tincalconite crystals from Searles Lake, San Bernardino County, California: American Mineralogist: 33: 472; Bowser, C.J. (1964), The origin of tincalconite at Searles Lake, California: (title) American Mineralogist: 49: 1507; Smith, George Irving & D.V. Haines (1964), Character and distribution of nonclastic minerals in the Searles Lake evaporite deposit, California: USGS Bulletin 1181-P: 21; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 261; American Mineralogist (1965): 50: 281; American Mineralogist (1973): 58: 523.
  • Nevada
    • Esmeralda Co.
NBMG Spec. Pub. 31 Minerals of Nevada
Mineral and/or Locality  
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