Hurlbutite Mineral Data

Hurlbutite Mineral Data +

General Hurlbutite Information

Chemical Formula:

CaBe2(PO4)2

Composition:

Molecular Weight = 248.05 gm

Calcium 16.16 % Ca 22.61 % CaO

Beryllium 7.27 % Be 20.17 % BeO

Phosphorus 24.97 % P 57.23 % P₂O₅

Oxygen 51.60 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaBe₂(PO₄)₂

IMA Status:

Valid Species (Pre-IMA) 1952

Locality:

G. E. Smith mine, Newport, Sullivan County, New Hampshire, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Cornelius S. Hurlbut, Jr. (1906-), professor of mineralogy, Harvard University, Cambridge.

Synonym:

ICSD 6189

PDF 34-1441

Hurlbutite Image

Images:

Hurlbutite Roscherite

Comments: White, round crystal clusters of hurlbutite on reddish brown roscherite.
Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Hurlbutite Crystallography

Axial Ratios:

a:b:c =0.945:1:0.8879

Cell Dimensions:

a = 8.299, b = 8.782, c = 7.798, Z = 4; beta = 90.5° V = 568.31 Den(Calc)= 2.90

Crystal System:

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

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

By Intensity(I/I_o): 3.67(1), 2.78(0.9), 3.03(0.9),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Lindbloom J T , Gibbs G V , Ribbe P H , American Mineralogist , 59 (1974) p.1267-1271, The crystal structure of hurlbutite: A comparison with danburite and anorthite

Physical Properties of Hurlbutite

Cleavage:

None

Color:

Colorless, Greenish white, Yellow.

Density:

2.877

Diaphaniety:

Transparent to Translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

6 - Orthoclase

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Hurlbutite

Gladstone-Dale:

CI meas= -0.04 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.031 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2069,KPDmeas= 0.2086,KC= 0.2006

Optical Data:

Biaxial (-), a=1.595, b=1.601, g=1.604, bire=0.0090, 2V(Calc)=70, 2V(Meas)=70. Dispersion r > v weak.

Calculated Properties of Hurlbutite

Electron Density:

r_electron=2.85 gm/cc
note: r_Hurlbutite=2.90 gm/cc.

Fermion Index

Fermion Index = 0.07313
Boson Index = 0.92687

Photoelectric:

PE_Hurlbutite= 3.27 barns/electron
U=PE_Hurlbutite x r_electron= 9.32 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hurlbutite is Not Radioactive

Hurlbutite Classification

Dana Class:

38.3.6.1 (38)Anhydrous Phosphates, etc

(38.3)(A+ B++)3 (XO4)2

(38.3.6)Dana Group

38.3.6.1 Hurlbutite CaBe2(PO4)2 P 2₁/a 2/m

Strunz Class:

VII/A.01-40 VII - Phosphates, Arsenates and Vanadates

VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of small size: Li, Be, Al

VII/A.01 - Berlinite - Beryllonite - Hurlbutite series

VII/A.01-10 Berlinite AlPO4 P 3₁21,P 3₂21 3 2

VII/A.01-12 Alarsite! AlAsO4 P 3₁21,P 3₂21 3 2

VII/A.01-15 Rodolicoite! FePO4 R 3121 3 2

VII/A.01-20 Lithiophosphate Li3PO4 P mn2₁ mm2

VII/A.01-25 Nalipoite NaLi2PO4 Pmnb 2/m 2/m 2/m

VII/A.01-30 Beryllonite NaBePO4 P 2₁/n 2/m

VII/A.01-40 Hurlbutite CaBe2(PO4)2 P 2₁/a 2/m

Other Hurlbutite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Hurlbutite :
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 - WWW-MINCRYST 13 -École des Mines de Paris

Search for Hurlbutite using:

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

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

Translate Hurlbutite Mineral Data :

Ask about Hurlbutite 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 Hurlbutite Specimen Label here :

Hurlbutite

CaBe2(PO4)2
Dana No: 38.3.6.1 Strunz No: VII/A.01-40
Locality:

Notes: