Andesine
Andesine is a silicate mineral, a member of the plagioclase feldspar solid solution series. Its chemical formula is (Ca, Na)(Al, Si)4O8, where Ca/(Ca + Na) (% Anorthite) is between 30%-50%. The formula may be written as Na0.7-0.5Ca0.3-0.5Al1.3-1.5Si2.7-2.5O8. The plagioclase feldspars are a continuous solid solution series and as such the accurate identification of individual members requires detailed optical study, chemical analysis or density measurements. Refractive indices and specific gravity increase directly with calcium content. It is sometimes used as a gemstone.
primaryTopic
Andesine
Andesine is a silicate mineral, a member of the plagioclase feldspar solid solution series. Its chemical formula is (Ca, Na)(Al, Si)4O8, where Ca/(Ca + Na) (% Anorthite) is between 30%-50%. The formula may be written as Na0.7-0.5Ca0.3-0.5Al1.3-1.5Si2.7-2.5O8. The plagioclase feldspars are a continuous solid solution series and as such the accurate identification of individual members requires detailed optical study, chemical analysis or density measurements. Refractive indices and specific gravity increase directly with calcium content. It is sometimes used as a gemstone.
has abstract
Andesin gilt wie Labradorit he ...... h plattiger Mineral-Aggregate.
@de
Andesina (ou Andesita, forma a ...... primeira de 70 a 50 por cento.
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Andesine is a silicate mineral ...... sometimes used as a gemstone.
@en
Andezyn – minerał z gromady kr ...... w, gdzie pospolicie występuje.
@pl
Het mineraal andesien is een n ...... Het behoort tot de veldspaten.
@nl
L'andesina è un minerale, del ...... erata una varietà dell'albite.
@it
La andesina es un mineral del ...... taje de anortita (CaAl2Si2O8).
@es
Андезин (англ. andesine, нем. ...... ндезитовых лавах в этих горах.
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Wikipage page ID
Wikipage revision ID
744,719,339
2V
Measured: 76° to 83°
birefringence
Caption
category
class
cleavage
Perfect on {001}, good on {010}
color
White, gray, green, yellow, flesh-red
diagnostic
Requires optical/chemical analysis
diaphaneity
Transparent to translucent
fracture
Uneven to conchoidal
gravity
habit
Crystals rare, to 2 cm; commonly massive or granular
luster
Subvitreous to pearly
opticalprop
refractive
nα = 1.543 - 1.554 nβ = 1.547 - 1.559 nγ = 1.552 - 1.562
system
tenacity
twinning
Common following albite, pericline, and carlsbad twin laws
unit cell
a = 8.155 Å, b = 12.9 Å,
c = 9.16 Å; α = 93.917°,
β = 116.3333°, γ = 89.166°; Z = 8
hypernym
comment
Andesin gilt wie Labradorit he ...... h plattiger Mineral-Aggregate.
@de
Andesina (ou Andesita, forma a ...... primeira de 70 a 50 por cento.
@pt
Andesine is a silicate mineral ...... sometimes used as a gemstone.
@en
Andezyn – minerał z gromady kr ...... w, gdzie pospolicie występuje.
@pl
Het mineraal andesien is een n ...... Het behoort tot de veldspaten.
@nl
L'andesina è un minerale, del ...... erata una varietà dell'albite.
@it
La andesina es un mineral del ...... taje de anortita (CaAl2Si2O8).
@es
Андезин (англ. andesine, нем. ...... ндезитовых лавах в этих горах.
@ru
label
Andesien
@nl
Andesin
@de
Andesina
@es
Andesina
@it
Andesina
@pt
Andesine
@en
Andezyn
@pl
Андезин
@ru
wasDerivedFrom
depiction
isPrimaryTopicOf
name
Andesine
@en