Hydrochlorborite Mineral Data

Hydrochlorborite Mineral Data
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General Hydrochlorborite Information

Help on Chemical Formula: Chemical Formula: Ca2B4O4(OH)7Cl•7(H2O)
Help on Composition: Composition: Molecular Weight = 468.00 gm
   Calcium   17.13 %  Ca   23.96 % CaO
   Boron      9.24 %  B    29.75 % B2O3
   Hydrogen   4.52 %  H    40.42 % H2O
   Chlorine   7.58 %  Cl    7.58 % Cl
               -   %   Cl   -1.71 % -O=Cl2   
   Oxygen    61.54 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2B4O4(OH)7Cl•7(H2O)
Help on Environment: Environment: Dry-season evaporite mineral in playa sediments.
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: Unspecified locality, China [the Qinghai-Xizang Plateau, Tibet]. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the essential chemical components, water, chlorine and borate.
Help on Name Pronunciation: Name Pronunciation: Hydrochlorborite + Pronunciation Say HYDROCHLORBORITE
Help on Synonym: Synonym: ICSD 100662
  PDF 29-312
 

Hydrochlorborite Image

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Hydrochlorborite

Comments: White botryoidal crust of hydrochlorborite on massive white anhydrite.
Location: Takuko, Tibet. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hydrochlorborite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =2.6052:1:1.9515
Help on Cell Dimensions: Cell Dimensions: a = 22.783, b = 8.745, c = 17.066, Z = 8; beta = 96.705° V = 3,376.93 Den(Calc)= 1.84
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.474(1), 6.005(0.24), 3.605(0.09),
Click Here for Large Hydrochlorborite Structure Window Crystal Structure:

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Brown G E , Clark J R , American Mineralogist , 63 (1978) p.814-823, Crystal structure of hydrochlorborite, Ca2[B3O3(OH)4.OB(OH)3]Cl.7H2O,, a seasonal evaporite mineral

 

Physical Properties of Hydrochlorborite

Help on Cleavage: Cleavage: {???} Perfect, {001} Good
Help on Color: Color: Colorless.
Help on Density: Density: 1.852
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Hydrochlorborite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2757,KPDmeas= 0.2739,KC= 0.2757
Ncalc = 1.51
Help on Optical Data: Optical Data: Biaxial (+), a=1.499, b=1.502, g=1.521, bire=0.0220, 2V(Calc)=44, 2V(Meas)=45.
 

Calculated Properties of Hydrochlorborite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.90 gm/cc
note: Specific Gravity of Hydrochlorborite =1.84 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEHydrochlorborite = 2.74 barns/electron
U=PEHydrochlorborite x rElectron Density= 5.21 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hydrochlorborite is Not Radioactive
 

Hydrochlorborite Classification
Help on Dana Class: Dana Class: 26.03.04.01 (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.03)Dana Type
  (26.03.04)Dana Group
 
26.03.04.01 Hydrochlorborite Ca2B4O4(OH)7Cl•7(H2O) I2/a 2/m
Help on Strunz Class: Strunz Class: 06.DA.30 06 - BORATES
  06.D - Tetraborates
  06.DA -Neso-tetraborates
 
06.DA.30 Hydrochlorborite Ca2B4O4(OH)7Cl•7(H2O) I2/a 2/m
 

Other Hydrochlorborite Information
Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Hydrochlorborite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Ask about Hydrochlorborite here :
Ask-A-Mineralogist from the Mineralogical Society of America
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Rockhounds Discussion Group on Yahoo Groups
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Print or Cut-and-Paste your Hydrochlorborite Specimen Label here :

Hydrochlorborite

Ca2B4O4(OH)7Cl•7(H2O)
Dana No: 26.03.04.01 Strunz No: 06.DA.30
Locality:

 

Notes: