Childrenite Mineral Data

Childrenite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About



[On-Line Catalogue] [On-Line Auctions] [eBay] [Contact Us] [Policies]
We specialize in fine European and Asian Mineral Specimens
Heliodor is based in Prague, Czech Republic


General Childrenite Information

Help on Chemical Formula: Chemical Formula: Fe++Al(PO4)(OH)2•(H2O)
Help on Composition: Composition: Molecular Weight = 229.83 gm
   Aluminum    11.74 %  Al   22.18 % Al2O3
   Iron        24.30 %  Fe   31.26 % FeO
   Phosphorus  13.48 %  P    30.88 % P2O5
   Hydrogen     1.75 %  H    15.68 % H2O
   Oxygen      48.73 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+Al(PO4)(OH)2•(H2O)
Help on Environment: Environment: Forma a series with eosphorite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1823
Help on Locality: Locality: Tavistock, Devonshire, England. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for John George Children (1777-1852), English chemist and mineralogist.
Help on Name Pronunciation: Name Pronunciation: Childrenite + Pronunciation Say CHILDRENITE
Help on Synonym: Synonym: ICSD 30686
  PDF 47-1859
 

Childrenite Image

Click Here for Larger Childrenite Image in a New Browser Window Images:
Click Here for Larger Childrenite Image

Childrenite

Comments: Single, terminated crystal of childrenite.
Location: Linopolis, Minas Gerais, Brazil. Scale: 2.6 cm.
© John Veevaert
Click Here for Larger Childrenite Image in a New Browser Window Images:
Click Here for Larger Childrenite Image

Childrenite

Comments: Light-brown, acicular, divergent sprays of childrenite.
Location: Rapid Creek, Yukon, Canada. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix
Click Here for Larger Childrenite Image in a New Browser Window Images:
Click Here for Larger Childrenite Image

Childrenite

Comments: Columnar, brown, prismatic, crystalline aggregate of childrenite with dark blue lazulite.
Location: Rapid Creek, Yukon Territory, Canada. Scale: See Image.
© Jeff Weissman / Photographic Guide to Mineral Species

Childrenite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.776:1:0.5164
Help on Cell Dimensions: Cell Dimensions: a = 10.395, b = 13.394, c = 6.918, Z = 8; V = 963.20 Den(Calc)= 3.17
Help on Crystal System: Crystal System: Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Bba2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.81(1), 2.42(0.4), 5.27(0.4),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: ( 1 2 1) ( 1 0 0) ( 1 1 0) ( 1 3 1)

Warning: this large pop-up is very compute intensive and may not work well with some computers.
Click Here for Large Childrenite Structure Window 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


Giuseppetti G , Tadini C , Neues Jahrbuch fur Mineralogie, Monatshefte , 1984 (1984) p.263-271, The crystal structure of childrenite from Tavistock (SW England),, Ch89Eo11 term of childrenite-eosphorite series, Note: this is the prefered model, Locality: Tavistock, SW England

View Additional jPOWD Structure files for Childrenite
[1]
 

Physical Properties of Childrenite

Help on Cleavage: Cleavage: {???} Imperfect
Help on Color: Color: White, Yellowish brown, Brownish black.
Help on Density: Density: 3.18 - 3.25, Average = 3.21
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 4.5-5 - Near Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: white
 

Optical Properties of Childrenite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2127,KPDmeas= 0.2097,KC= 0.2145
Ncalc = 1.68 - 1.7
Help on Optical Data: Optical Data: Biaxial (-), a=1.649, b=1.683, g=1.691, bire=0.0420, 2V(Calc)=50, 2V(Meas)=40-45. Dispersion strong, r < v.
Help on Pleochroism (x): Pleochroism (x): yellow or yellow.
Help on Pleochroism (y): Pleochroism (y): pink or pink.
Help on Pleochroism (z): Pleochroism (z): pale pink or colorless.
 

Calculated Properties of Childrenite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.14 gm/cc
note: Specific Gravity of Childrenite =3.17 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0053879819
Boson Index = 0.9946120181
Help on Photoelectric: Photoelectric: PEChildrenite = 8.15 barns/electron
U=PEChildrenite x rElectron Density= 25.64 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Childrenite is Not Radioactive
 

Childrenite Classification
Help on Dana Class: Dana Class: 42.07.01.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.07)where (AB)5 (XO4)3 Zq · x(H2O)
  (42.07.01)Childrenite Group
 
42.07.01.01 Childrenite FeAl(PO4)(OH)2•(H2O) Bba2 mm2
 
42.07.01.02 Eosphorite MnAl(PO4)(OH)2•(H2O) Bbam 2/m 2/m 2/m
 
42.07.01.03 Ernstite (Mn1-xFex)Al(PO4)(OH)2-xOx C 2/c or Cc Mono
 
42.07.01.04 Sinkankasite H2MnAl(PO4)2(OH)•6(H2O) P1 1
Help on Strunz Class: Strunz Class: 08.DD.20 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DD -With only medium-sized cations, (OH, etc.):RO4 = 2:1
 
08.DD.20 Childrenite FeAl(PO4)(OH)2•(H2O) Bba2 mm2
 
08.DD.20 Eosphorite MnAl(PO4)(OH)2•(H2O) Bbam 2/m 2/m 2/m
 
08.DD.20 Ernstite (Mn1-xFex)Al(PO4)(OH)2-xOx C 2/c or Cc Mono
 

Other Childrenite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Childrenite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineralienatlas (Deutsch)
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

Search for Childrenite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Childrenite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Childrenite Mineral Data :

Ask about Childrenite 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 Espaņol

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

Childrenite

Fe++Al(PO4)(OH)2•(H2O)
Dana No: 42.07.01.01 Strunz No: 08.DD.20
Locality:

 

Notes: