Joaquinite-(Ce) Mineral Data

[About Us] [Products] [Fluorescent Mineals] [Contact Us]
UVTools is a supplier of affordable ultraviolet lamps and fluorescent minerals
Our customers include mineral dealers, gift shops, and museums worldwide
We provide an array of shortwave, midwave, and longwave lamps at the best price!

General Joaquinite-(Ce) Information

Chemical Formula:

NaFe++Ba2Ce2(Ti,Nb)2[Si4O12]2O2(OH,F)•(H2O)

Composition:

Molecular Weight = 1,419.19 gm

Barium 19.35 % Ba 21.61 % BaO

Sodium 1.62 % Na 2.18 % Na₂O

Cerium 19.75 % Ce 23.13 % Ce₂O₃

Titanium 3.37 % Ti 5.63 % TiO₂

Niobium 6.55 % Nb 9.36 % Nb₂O₅

Iron 3.94 % Fe 5.06 % FeO

Silicon 15.83 % Si 33.87 % SiO₂

Hydrogen 0.18 % H 1.59 % H₂O

Oxygen 28.75 % O

Fluorine 0.67 % F 0.67 % F

- % F -0.28 % -O=F₂

______ ______

100.00 % 102.82 % = TOTAL OXIDE

Empirical Formula:

NaFe²⁺Ba₂Ce₂TiNb(Si₄O₁₂)₂(OH)_0.5F_0.5•(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1909

Locality:

Benitoite Gem mine, head waters of the San Benito River, Joaquin Ridge, Diablo Range, 1 mile south of Santa Rita Peak, San Benito Co. California. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Name Pronunciation:

Joaquinite-(Ce) + Pronunciation

Synonym:

ICSD 4359

IMA2000-D

PDF 36-385

Joaquinite-(Ce) Image

Images:

Joaquinite-(Ce)

Comments: Brown crystal of joaquinite-(Ce).
Location: Benitoite Gem mine, San Benito County, California, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Joaquinite-(Ce) Crystallography

Axial Ratios:

a:b:c =1.0856:1:1.2216

Cell Dimensions:

a = 10.516, b = 9.686, c = 11.833, Z = 2; beta = 109.67° V = 1,134.95 Den(Calc)= 4.15

Crystal System:

Monoclinic - SphenoidalH-M Symbol (2) Space Group: C 2

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

By Intensity(I/I_o): 2.8(1), 5.58(0.7), 2.95(0.18),

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

Dowty E , American Mineralogist , 60 (1975) p.872-878, Crystal structure of joaquinite

Physical Properties of Joaquinite-(Ce)

Cleavage:

{???} Good

Color:

Brown, Honey yellow, Orange.

Density:

3.62 - 3.98, Average = 3.8

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Hardness:

5-5.5 - Apatite-Knife Blade

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Optical Properties of Joaquinite-(Ce)

Gladstone-Dale:

CI meas= -0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.064 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1853,KPDmeas= 0.2024,KC= 0.198
Ncalc = 1.72 - 1.82

Optical Data:

Biaxial (+), a=1.748-1.754, b=1.76-1.767, g=1.762-1.823, bire=0.0140-0.0690

Pleochroism (x):

light yellow.

Pleochroism (y):

light yellow.

Pleochroism (z):

colorless.

Calculated Properties of Joaquinite-(Ce)

Electron Density:

Bulk Density (Electron Density)=3.49 gm/cc
note: Specific Gravity of Joaquinite-(Ce) =3.80 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_{Joaquinite-(Ce)}= 196.52 barns/electron
U=PE_{Joaquinite-(Ce)} x r_electron= 685.10 barns/cc.

Radioactivity:

GRapi = 19,322.82 (Gamma Ray American Petroleum Institute Units)
Concentration of Joaquinite-(Ce) per GRapi unit = 51.75 (PPM)

Joaquinite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

**Estimated Radioactivity from Joaquinite-(Ce)** - weak
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Bequerols (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.95 cm	442,304	1.20E-05	19,322.82	6.35
100 gm / 3.69 cm	44,230	1.20E-06	1,932.28	0.64
10 gm / 1.71 cm	4,423	1.20E-07	193.23	0.06
1 gm / 7.95 mm	442	1.20E-08	19.32	0.01
0.1 gm / 3.69 mm	44	1.20E-09	1.93	0.00
0.01 gm / 1.71 mm	4	1.20E-10	0.19	0.00
0.001 gm / 0.80 mm	0	1.20E-11	0.02	0.00

Weight of pure Joaquinite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.80 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 0.99 % Th) From Sum REE Elements (19.75 % REE)

Joaquinite-(Ce) Classification

Dana Class:

60.01.01a.01 (60)Cyclosilicate Four-Membered Rings

(60.01)as Titanosilicates

(60.01.01a)Joaquinite group (Clino-joaquinite subgroup)

60.01.01a.01 Joaquinite-(Ce) NaFeBa2Ce2(Ti,Nb)2[Si4O12]2O2(OH,F)•(H2O) C 2 2

60.01.01a.02 Strontiojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2•(H2O) C 2 2

Strunz Class:

09.CE.25 09 - SILICATES (Germanates)

09.C - Cyclosilicates

09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),

09.CE.25 Byelorussite-(Ce) NaBa2(Ce,La)2MnTi2Si8O26(F,OH)•(H2O) P 2₁2₁2₁ 2 2 2

09.CE.25 Bario-orthojoaquinite Fe2(Ba,Sr)4Ti2[Si4O12]O2•(H2O) Ccmm or Ccm2 Ortho

09.CE.25 Joaquinite-(Ce) NaFeBa2Ce2(Ti,Nb)2[Si4O12]2O2(OH,F)•(H2O) C 2 2

09.CE.25 Orthojoaquinite-(Ce) NaFeBa2Ce2Ti2[Si4O12]2O2(OH)•(H2O) Ccmm or Ccm21 Ortho

09.CE.25 Strontio-orthojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2•(H2O) Pbcm or Pbc2 Ortho

09.CE.25 Strontiojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2•(H2O) C 2 2

09.CE.25 Orthojoaquinite-(La)! Ba2Na(La,Ce)2FeTi2Si8O26(OH,O,F)•H2O Ccmm 2/m 2/m 2/m

Other Joaquinite-(Ce) Information

References:

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

See Also:

Links to other databases for Joaquinite-(Ce) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
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 Joaquinite-(Ce) using:

[ALTAVISTA] [AOL] [bing] [GeoScienceWorld] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Joaquinite-(Ce) :

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Lapis Mineral Journal

Mineral News

UV Tools

Wrights Rock Shop

Translate Joaquinite-(Ce) Mineral Data :

Ask about Joaquinite-(Ce) 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 Joaquinite-(Ce) Specimen Label here :

Joaquinite-(Ce)

NaFe++Ba2Ce2(Ti,Nb)2[Si4O12]2O2(OH,F)•(H2O)
Dana No: 60.01.01a.01 Strunz No: 09.CE.25
Locality:

Notes: