Priceite Mineral Data

Priceite Mineral Data +

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General Priceite Information

Chemical Formula:

Ca2B5O7(OH)5·H2O

Composition:

Molecular Weight = 349.25 gm

Calcium 22.95 % Ca 32.11 % CaO

Boron 15.48 % B 49.83 % B₂O₃

Hydrogen 2.02 % H 18.05 % H₂O

Oxygen 59.55 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂B₅O₇(OH)₅·(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1873

Locality:

Chetco, Curry County, Oregon, USA. Link to MinDat.org Location Data.

Name Origin:

Named after the American metallurgist, Thomas Price (1837-?), San Francisco metallurgist, who first analyzed the mineral.

Synonym:

Pandermite

Priceite Image

Images:

Priceite Ginorite

Comments: Clear platy crystalline coatings of ginorite on rock with white priceite.
Location: Corkscrew Canyon, Death Valley, Inyo County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Priceite

Comments: Botryoidal priceite aggregate.
Location: Lone Randi Quarry, Curry County, Oregon, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Priceite Crystallography

Axial Ratios:

a:b:c =1.6661:1:1.7703

Cell Dimensions:

a = 11.623, b = 6.976, c = 12.35, Z = 4; beta = 110.7° V = 936.72 Den(Calc)= 2.48

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 3.63(1), 10.92(1), 5.46(0.8),

Crystal Structure:

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drag2 - RMB Resize/Rotate
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H - Help Screen
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Wallwork K S , Pring A , Taylor M R , Hunter B A , The Canadian Mineralogist , 40 (2002) p.1199-1206, The structure of priceite, a basic hydrated calcium borate,, by ab initio powder-diffraction methods

Physical Properties of Priceite

Cleavage:

[001] Perfect

Color:

White.

Density:

2.42

Fracture:

Earthy - Dull, clay-like fractures with no visible crystalline affinities, (e.g. howlite).

Habit:

Concretionary - Rounded massive fine-grained materials.

Habit:

Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye.

Habit:

Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).

Hardness:

3-3.5 - Calcite-Copper Penny

Luminescence:

None.

Luster:

Earthy (Dull)

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Priceite

Gladstone-Dale:

CI meas= -0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.236,KPDmeas= 0.2419,KC= 0.236

Optical Data:

Biaxial (-), a=1.571-1.573, b=1.59-1.591, g=1.593-1.594, bire=0.0210-0.0220, 2V(Calc)=42-44, 2V(Meas)=32-44. Dispersion r < v strong.

Calculated Properties of Priceite

Electron Density:

r_electron=2.50 gm/cc
note: r_Priceite=2.48 gm/cc.

Fermion Index

Fermion Index = 0.03139
Boson Index = 0.96861

Photoelectric:

PE_Priceite= 3.02 barns/electron
U=PE_Priceite x r_electron= 7.54 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Priceite is Not Radioactive

Priceite Classification

Dana Class:

25.5.1.1 (25)Anhydrous Borates Containing Hydroxyl or Halogen

(25.5)Dana Type

(25.5.1)Dana Group

25.5.1.1 Priceite Ca2B5O7(OH)5·H2O P 2₁/c 2/m

Strunz Class:

V/H.16-10 V - Nitrates, Carbonates and Borates

V/H - Group borates. Planary and tetrahedral groups [B3O5]1- to [B6O10]2-

V/H.16 - Priceite - Tertschite series

V/H.16-10 Priceite Ca2B5O7(OH)5·H2O P 2₁/c 2/m

V/H.16-20 Tertschite Ca4B10O19·20(H2O) Unk Mono

Other Priceite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Dana8, AmMin, v 88, p 935) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Priceite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Priceite

Ca2B5O7(OH)5·H2O
Dana No: 25.5.1.1 Strunz No: V/H.16-10
Locality:

Notes: