Nephrite ([.Ca][.Mg][.Fe])^{4}[...Si]^{3}? Int.
Wollastonite [.Ca]^{3}[...Si]^{2}c. Iolite ([.Mg][.Fe])^{3}[...Si]^{2} + 3[...Al=][...Si]
IV.
a. Beryl [...Be][...Si]^{2} + [...Al=][...Si]^{2} b. Diallage ([.Ca][.Mg][.Fe])^{3}([...Si][...Al=])^{2} Hypersthene ([.Mg][.Fe])^{3}[...Si]^{2}c. Fuchsite ([.K]^{5}[...Si])^{2} + 9([...Al=][...Cr=])^{6}[...Si]^{6} V.
a. Leucite [.K]^{3}[...Si]^{2} + [...Al=][...Si]^{2} b. Chondrodite ([.Mg],[.Mg]F)^{4}([...Si]SiF^{3}) Olivine ([.Mg][.Fe][.Ca])^{2}[...Si]
c. Andalusite ([...Al=]Fe)^{3}[...Si]^{2} Chrysoberyl [...Be] + [...Al=]
Kaynite [...Al=]^{3}[...Si]^{2} Pycnite 6[...Al=]^{3}[...Si]^{2} + (3[...Al=]F^{3} + 2[...Si]F^{3}) Topaz 6[...Al=]^{3}[...Si]^{2} + (3[...Al=]F^{3} + 2[...Si]F^{3}) Zircon [...Zr=][...Si]
Staurolite ([...Al=]Fe)^{2}[...Si]
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Hydrous Silicates.
________________________________________________________________________ Fus. alone and with NaC.
Mineral. Formula.
________________________________________________________________________ I.
a. a.n.a.lcime [.Na]^{3}[...Si]^{2} + 3[...Al=][...Si]^{2} + 6[.H] Int.
Apophyllite ([.K], KF)([...Si], SiF^{3}) + 6[.Ca][...Si] + 15[.H] Int.
Brewsterite ([.Sr][.Ba])[...Si] + [...Al=][...Si]^{3} + 5[.H] Int.
Chabasite ([.Ca],[.Na],[.K])^{3}[...Si] + 3[...Al=][...Si]^{2} + 18[.H] Int.
Lapis Lazuli [...Si],[...S],[...Al=], Fe, [.Ca], [.Na], [.H]
Laumonite [.Ca]^{3}[...Si]^{2} + 3[...Al=][...Si]^{2} + 12[.H] Int.
Mesotype ([.Na][.Ca])[...Si] + [...Al=][...Si] + 3[.H] Int.
Natrolite [.Na][...Si] + [...Al=][...Si] + 2[.H] Int.
Prehnite [.Ca]^{2}[...Si] + [...Al=][...Si] + [.H] Int.
Scolezite [.Ca][...Si] + [...Al=][...Si] + 3[.H] Int.
Thomsonite ([.Ca][.Na])^{3}[...Si] + 3[...Al=][...Si]
+ 7[.H] Int.
Datholite 2[.Ca]^{3}[...Si] + [...B]^{3}[...Si]^{2} + 3[.H] Int.
Heulandite [.Ca][...Si] + [...Al=][...Si]^{3} + 5[.H] Int.
Stilbite [.Ca][...Si] + [...Al=][...Si]^{3} + 6[.H] Int.
b. Okenite [.Ca]^{3}[...Si]^{4} + 6[.H] Int.
Pectolite ([.Ca][.Na])^{4}[...Si]^{3} + [.H] Int.
c. Saponite 2[.Mg]^{3}[...Si]^{2} + [...Al=][...Si]
+ 10 or 6[.H]
II.
a. Antrimolite 3([.Ca][.K])[...Si] + 5[...Al=][...Si] + 15[.H]
Harmatome [...Ba][...Si] + [...Al=]S^{2} + 5[.H]
b. Brevicite [.Na][...Si] + [...Al=][...Si] + 2[.H]
Orthite [.R]^{3}[...Si] + [...R=][...Si] + ([.H]?) Int.
III.
c. Pitchstone [...Si],[...Al=], Fe, [.Mg][.Na], [.K][.H]
Talc to V. [.Mg]^{6}[...Si]^{5} + 2[.H]
Chlorite 3([.Mg]Fe)^{3}[...Si] + ([...Al=]Fe)^{2}[...Si]
+ 9[.H]
Pinite [...Si],[...Al=],[.Fe],[.K],[.Mg],[.H]
IV.
a. Steat.i.te [.Mg]^{6}[...Si]^{5} + 4[.H]
c. Gilbert.i.te [...Si],[...Al=],[.Fe],[.Mg],[.H] Int.
Meerschaum [.Mg][...Si] + [.H]Serpentine [.Mg]^{9}[...Si]^{4} + 6[.H]V.
a. Gismondine ([.Ca][.K])^{2}[...Si] + 2[...Al=][...Si] + 9[.H]
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TABLE II.
_______________________________________________________________________a.n.a.lcimeIf transparent becomes white and opaque when heated,but on incipient fusion resumes its transparency andthen fuses to a clear gla.s.s.
AndalusiteWhen powdered and treated with cobalt solution oncharcoal, a.s.sumes a blue color.
ApophylliteFuses to a frothy white gla.s.s.
AxiniteImparts a green color to the blowpipe flame, owing tothe presence of boracic acid. This reaction isespecially distinct, if the mineral be previously mixedwith fluorspar and bisulphate of pota.s.sa.
BerylSometimes gives a chromium reaction in borax andmicrocosmic salt.
ChabasiteFuses to a white enamel.
ChondroditeEvolves fluorine in the gla.s.s tube, both when heatedalone and with microcosmic salt. It sometimes alsogives off a trace of water.
ChrysoberylIs unattacked by carbonate of soda. With nitrate ofcobalt on charcoal the finely powdered minerala.s.sumes a blue color.
DatholiteFuses to a clear gla.s.s and colors the flame green.
DiallageFrequently gives off water in small quant.i.ty.
FuchsiteGives the chromium reaction with borax and microcosmicsalt.
GadoliniteThat from Hitteroe, if heated in a partially coveredplatinum spoon to low redness, glows suddenly andbrilliantly.
HauyneAffords the sulphur reaction both on charcoal and whenfused with pota.s.sa. It contains both sulphur andsulphuric acid.
HyperstheneAs Diallage.
KyaniteAs Andalusite.
Lapis LazuliFuses to a white gla.s.s, and when treated with carbonateof soda on charcoal, gives the sulphur reaction onsilver.
LaumoniteWhen strongly heated, exfoliates and curls up.
LepidoliteColors the blowpipe flame crimson, from lithia; alsogives the fluorine reaction with microcosmic salt.
LeuciteSome varieties, when treated with cobalt solution,a.s.sume a blue color.
MeerschaumIn the gla.s.s bulb frequently blackens and evolves anempyreumatic odor due to organic matter. When this isburnt off, it again becomes white, and if moistenedwith nitrate of cobalt solution and heated, a.s.sumesa pink color.
OkeniteBehaves as Apophyllite.
OlivineSome varieties give off fluorine, when fused withmicrocosmic salt.
PectoliteSimilar to Apophyllite.
PetaliteImparts a slight crimson color to the flame, likeLepidolite.
PrehniteAs Chabasite.
Pycnitea.s.sumes a blue color, when treated with nitrate ofcobalt. Gives the fluorine reaction with microcosmicsalt.
PyropeGives the chromium reaction with borax and microcosmicsalt.
ScoleciteSimilar to Laumonite, but more marked.
ScapoliteOccasionally contains a small quant.i.ty of lithia, andcolors the flame red when fused with fluorspar andbisulphate of pota.s.sa.
SodaliteIf mixed with one-fifth its volume of oxide of copper,moistened to make the mixture cohere, and a smallportion placed upon charcoal and heated with the blueoxidizing flame, the outer flame will be coloredintensely blue from chloride of copper.
SpodumeneWhen not too strongly heated, colors the blowpipeflame red, when more strongly, yellow.
StilbiteAs Chabasite.
TopazWhen heated, remains clear. Otherwise as Pycnite.
TourmalineGives the boracic acid reaction with flourspar andbisulphate of pota.s.sa.
WollastoniteColors the blowpipe flame faintly red from lime.
ZirconThe colored varieties become white or colorless andtransparent, when heated. Is only slightly attackedby carbonate of soda.
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