Pringleite Mineral Data

General Pringleite Information

Chemical Formula:

Ca9B26O34(OH)24Cl4•13(H2O)

Composition:

Molecular Weight = 1,969.93 gm

Calcium 18.31 % Ca 25.62 % CaO

Boron 14.27 % B 45.94 % B₂O₃

Hydrogen 2.56 % H 22.86 % H₂O

Chlorine 7.20 % Cl 7.20 % Cl

- % Cl -1.62 % -O=Cl₂

Oxygen 57.66 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₉B₂₆O₃₄(OH)₂₄Cl₄•13(H₂O)

Environment:

Found in an evaporite deposit. Dimorphous with ruitenbergite.

IMA Status:

Approved IMA 1993

Locality:

Potash Corporation of America mine, Penobsquis evaporite deposit, near Sussex, New Brunswick, Canada. Link to MinDat.org Location Data.

Name Origin:

Named for Gordon J. Pringle (1944- ), mineralogist, Geological Survey of Canada, Ottawa, Canada.

Name Pronunciation:

Pringleite + Pronunciation

Synonym:

ICSD 76888

IMA1992-010

PDF 46-1428

Pringleite Image

Images:

Pringleite

Comments: SEM back-scatter photomicrograph of a polished thick section containing pringleite (Pr), hilgardite-lA (Hi) and halite (Hal). (CanMin, v31:795).
Location: Potash Company of America mine at Penobsquis, near Sussex, New Brunswick, Canada. Scale: Picture Size 2 mm.
© Canadian Mineralogist

Pringleite Crystallography

Axial Ratios:

a:b:c =0.9769:1:0.7452

Cell Dimensions:

a = 12.759, b = 13.06, c = 9.733, Z = 1; alpha = 102.14°, beta = 102.03°, gamma = 85.68° V = 1,546.34 Den(Calc)= 2.12

Crystal System:

Triclinic - PedialH-M Symbol (1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.69(1), 9.21(0.7), 5.74(0.6),

Crystal Structure:

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drag2 - RMB Resize/Rotate
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Grice J D , Burns P C , Hawthorne F C , The Canadian Mineralogist , 32 (1994) p.1-14, Determination of the megastructures of the borate polymorphs pringleite and, ruitenbergite, Note: Cell angles modified by Grice, June 2002

Physical Properties of Pringleite

Cleavage:

{???} Good

Color:

Colorless, Light yellow, Orange.

Density:

2.21

Diaphaneity:

Transparent

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Pringleite

Gladstone-Dale:

CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2615,KPDmeas= 0.2496,KC= 0.2531
Ncalc = 1.53 - 1.56

Optical Data:

Biaxial (+), a=1.537, b=1.548, g=1.57, bire=0.0330, 2V(Calc)=72, 2V(Meas)=71.4-77.

Calculated Properties of Pringleite

Electron Density:

Bulk Density (Electron Density)=2.23 gm/cc
note: Specific Gravity of Pringleite =2.21 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Pringleite= 2.90 barns/electron
U=PE_Pringleite x rElectron Density= 6.49 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pringleite is Not Radioactive

Pringleite Classification

Dana Class:

26.05.17.01 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.05)Dana Type

(26.05.17)Pringleite Group

26.05.17.01 Pringleite Ca9B26O34(OH)24Cl4•13(H2O) P1 1

26.05.17.02 Ruitenbergite Ca9B26O34(OH)24Cl4•13(H2O) P 2₁ 2

26.05.17.03 Brianroulstonite! Ca3[B5O6(OH)6](OH)Cl2•8(H2O) Pa m

26.05.17.04 Penobsquisite! Ca2Fe[B9O13(OH)6]Cl•4(H2O) P 2₁ 2

26.05.17.05 Walkerite! Ca16(Mg,Li,[])2[B13O17(OH)12]4Cl6•28(H2O) Pba2 mm2

Strunz Class:

06.GD.05 06 - BORATES

06.G - Heptaborates and other Megaborates

06.GD -Mega-tektoborates

06.GD.05 Ruitenbergite Ca9B26O34(OH)24Cl4•13(H2O) P 2₁ 2

06.GD.05 Pringleite Ca9B26O34(OH)24Cl4•13(H2O) P1 1

Other Pringleite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.79,p1011,1994) OPTIC PROP.(Am.Min.,Vol.79,p1011,1994)

See Also:

Links to other databases for Pringleite :
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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Print or Cut-and-Paste your Pringleite Specimen Label here :

Pringleite

Ca9B26O34(OH)24Cl4•13(H2O)
Dana No: 26.05.17.01 Strunz No: 06.GD.05
Locality:

Notes: