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.

Name Pronunciation:

Hurlbutite + Pronunciation

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 - Prismatic H-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),

Physical Properties of Hurlbutite

Cleavage:

None

Color:

Colorless, Greenish white, Yellow.

Density:

2.877

Diaphaneity:

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
Ncalc = 1.58

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:

Bulk Density (Electron Density)=2.85 gm/cc
note: Specific Gravity of Hurlbutite =2.90 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

PE_Hurlbutite= 3.27 barns/electron
U=PE_Hurlbutite x rElectron Density= 9.32 barns/cc.

Radioactivity:

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

Hurlbutite Classification

Dana Class:

38.03.06.01 (38)Anhydrous Phosphates, etc

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

(38.03.06)Dana Group

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

Strunz Class:

08.AA.15 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AA -With small cations (some also with larger ones)

08.AA.15 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 - 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

Search for Hurlbutite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Hurlbutite :

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: 38.03.06.01 Strunz No: 08.AA.15
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.