Parasibirskite Mineral Data

Parasibirskite Mineral Data +

General Parasibirskite Information

Chemical Formula:

Ca2B2O5·(H2O)

Composition:

Molecular Weight = 199.79 gm

Calcium 40.12 % Ca 56.14 % CaO

Boron 10.82 % B 34.85 % B₂O₃

Hydrogen 1.01 % H 9.02 % H₂O

Oxygen 48.05 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂B₂O₅·(H₂O)

Environment:

In a vein between gehlenite-spurrite skarns and crystalline limestone. A polymorph of sibirskite.

IMA Status:

Approved IMA 1996 (Dana # Added)

Locality:

Fuka, Okayama Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

For it's relationship to sibirskite.

Synonym:

IMA1996-051

Search for Parasibirskite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Parasibirskite Crystallography

Axial Ratios:

a:b:c =1.2363:1:0.6538

Cell Dimensions:

a = 6.722, b = 5.437, c = 3.555, Z = 1; beta = 93° V = 129.75 Den(Calc)= 2.56

Crystal System:

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

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

By Intensity(I/I_o): 2.237(1), 6.73(0.7), 2.975(0.6),

Physical Properties of Parasibirskite

Cleavage:

[100] Perfect

Color:

White.

Density:

2.5

Diaphaniety:

Transparent

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

3 - Calcite

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Parasibirskite

Gladstone-Dale:

CI meas= -0.081 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.056 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2359,KPDmeas= 0.2416,KC= 0.2235

Optical Data:

Biaxial (+), a=1.556, b=1.593, g=1.663, bire=0.1070

Calculated Properties of Parasibirskite

Electron Density:

r_electron=2.56 gm/cc
note: r_{Parasibirskite}=2.56 gm/cc.

Fermion Index

Fermion Index = 0.0223
Boson Index = 0.9777

Photoelectric:

PE_{Parasibirskite}= 5.05 barns/electron
U=PE_{Parasibirskite} x r_electron= 12.94 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Parasibirskite is Not Radioactive

Parasibirskite Classification

Dana Class:

26.7.1.2 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.7)Dana Type

(26.7.1)Dana Group

26.7.1.1 Korzhinskite CaB2O4·(H2O) P 2/m 2/m

26.7.1.2 Parasibirskite ! Ca2B2O5·(H2O) P 2₁/m 2/m

Strunz Class:

V/H.02-35 V - Nitrates, Carbonates and Borates

V/H - Group borates. Planary groups [B2O5]4- to [B2O7]2-

V/H.02 - Szaibelyite - Sibirskite series

V/H.02-10 Szaibelyite MgBO2(OH) P 2₁/a 2/m

V/H.02-20 Sussexite MnBO2(OH) P 2₁/c 2/m

V/H.02-30 Sibirskite CaHBO3 P 2/m 2/m

V/H.02-35 Parasibirskite Ca2B2O5·(H2O) P 2₁/m 2/m

Other Parasibirskite Information

References:

NAME( MinRec) PHYS. PROP.(Min.Mag.,Vol.62,p521-525,1998) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Parasibirskite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

Search for Parasibirskite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Parasibirskite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Parasibirskite Mineral Data :

Ask about Parasibirskite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Parasibirskite Specimen Label here :

Parasibirskite

Ca2B2O5·(H2O)
Dana No: 26.7.1.2 Strunz No: V/H.02-35
Locality:

Notes: