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Britholite-(Y)

Pictures (1 Images total)

Britholith-(Y) (xx) mit Quarz
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Britholith-(Y) (xx) mit Quarz

Bildbreite: 35 mm; Fundort: West-Keivy, Westliches Keivy-Massiv, Kola-Halbinsel, Murmansk, Russland

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-04-23
Locality: Western Keivy Massif / Keivy-Massiv / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color rötlichbraun, schwarz
Streak color blass braun
Lustre Fettglanz
Hardness (Mohs) 5
Solubility +++ HCl
Crystal System monoklin, P21
Morphology prismatische Kristalle, säulig (ähnlich Turmalin), derbe Massen

Chemism

Chem­ical formula

(Y,Ca)5(SiO4,PO4)3(OH,F)

Chem­ical com­po­si­tion

Calcium, Silicium, Yttrium, Fluor, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 679.4160019625 u; Number of atoms in the formula: 21.75

Info

Empirical formula:

(Y0.75Ca0.25)5((SiO4)0.75(PO4)0.25)3((OH)0.75F0.25)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.11

0.75

3.45

1.0079470

0.7559603

Oxygen

O

30.02

12.75

58.62

15.9994300

203.9927325

Fluorine

F

0.70

0.25

1.15

18.9984033

4.7496008

Silicon

Si

9.30

2.25

10.34

28.0855300

63.1924425

Phosphorus

P

3.42

0.75

3.45

30.9737612

23.2303209

Calcium

Ca

7.37

1.25

5.75

40.0784000

50.0980000

Yttrium

Y

49.07

3.75

17.24

88.9058520

333.3969450

Anal­y­sis wt%

CaO : 13.53, MnO : 1.13, Fe2O3 : 2.10, Al2O3 : 1.05, Ce2O3 : 6.45, Y2O3 : 45.98, ThO2 : 0.90, SiO2 : 20.84, P2O5 : 5.84, F : 0.45, H2O : 0.73, Ln2O3 : 52.43 (Ref: Hintze, Handbuch der Mineralogie, 1904-1974)

Strunz 9th edi­tion incl. updates

9.AH.25

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
H: Insel(Neso)silikate mit CO3, SO4, PO4, etc.
25:Britholith-Gruppe

Lapis Clas­sifica­tion

VIII/B.27-050

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
27: Kationen mit Koordinationszahlen zwischen [8] und [12]; Inselsilikate mit [SO4] 2--, [CrO4] 2- und [PO4] 3--Gruppen

Clas­sifica­tion by Hölzel

8.BO.800

8: PHOSPHATES ARSENATES VANADATES
B: Phosphates (+Anions -Water)
O: Apatite Supergroup
8: Phosphate or Boro Silico Apatites - Britholites

Dana 8th edi­tion

52.04.09.02

52: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
04: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or > [6] coordination
09: Silicate apatites

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Apatite Supergroup  ⇒ Britholite group

Optical Properties

Color

rötlichbraun, schwarz

Streak color

blass braun

Diaphane­ity (Trans­parency)

durchscheinend bis opak

Lus­tre

Fettglanz

max. Birefrin­gence

0.004

Birefringence chart\! Britholite-(Y) title=Birefringence chart Britholite-(Y)

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.732

RI value γ / ε

1.728

Ri mean

1.731

2V angle

Uniaxial (-)

Optical Data Luminescence

Lumi­nes­cence

keine Fluoreszenz bekannt

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2

Space Group number

4

Space Group

P21

Cell param­e­ters a (Å)

9.43

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

6.81

Cell param­e­ters a/b or c/a

0.722

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

120°

Z

2

Volumne (ų)

524.4

X-Ray Pow­der Diffrac­tion

4.08(20),
3.494(30),
3.125(50),
3.087(50),
2.813(100),
2.753(90),
2.727(80),
1.885(30)

XRD chart Britholite-(Y)

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Morphol­ogy

prismatische Kristalle, säulig (ähnlich Turmalin), derbe Massen

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

5

VHN (Hard­ness Vick­ers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.25

4.303 ( ρ calc. Mineralienatlas )

Radioac­tiv­ity

keine

Insta­bil­ity

+++ HCl

Preface

Occurrences

in Pegmatiten

IMA group assignments

Other languages

Spanish

Britholita-(Y)

French

Britholite-(Y)

English

Britholite-(Y)

German

Britholith-(Y)

Russian

Бритолит-(Y)

Japanese

イットリウムブリソ石

Alternative Name

German

Abukumalit

Spanish

Abukumalita

English

Abukumalite

German

Abukumalith

Spanish

Britolita-(Y)

German

Yttrobritholit

Spanish

Yttrobritholita

English

Yttrobritholite

CNMNC symbol

Symbol

Bri-Y

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Britholith-(Y)
Google-Bilder-Suche - search for: Britholith-(Y)
Mineralienatlas.de (Forum) - search for: Britholith-(Y)

English pages

Mindat - search for: Britholite-(Y)
Webmineral - search for:Britholite-(Y)
Handbook-of-Mineralogy - search for: Britholite-(Y)
RRUFF - Raman, XRD and other mineral data - search for: Britholite-(Y)
RRUFF - References and PDF downloads - search for: Britholite-(Y)
American-Mineralogist-Crystal-Structure-Database - search for: Britholite-(Y)
Strahlen.org - search for: Britholite-(Y)

Russian pages

Webmineral.ru - search for: Бритолит-(Y)

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Britholith-(Y)
Crystal-Treasure.com - search for: Britholith-(Y)
Bosse - search for: Britholith-(Y)
Edelsteine Neuburg - Gundolf Fischer - search for: Britholith-(Y)

Locations with GPS information