Biotit: Perbedaan antara revisi

| name = Biotit

| category = Seri [[mika]] gelap

| boxwidth =

| boxbgcolor =

| image = Biotite aggregate - Ochtendung, Eifel, Germany.jpg

| imagesize =

| caption = Agregat tipis datar biotit<br/>(Image width: 2.5&nbsp;mm)

| formula = {{chem|K(Mg,Fe)|3|(AlSi|3|O|10|)(F,OH)|2}}

| color = Coklat gelap, coklat kehijauan, coklat kehitaman, kuning, putih

| habit = Massif hingga lempeng (platy)

| system = [[Monoklini]] (2/m) <br/>Space Group: C 2/m

| twinning = Umum pada [310], <br/>tidak umum pada {001}

| cleavage = Sempurna pada {001}

| fracture = Micaceous

| tenacity = Brittle hingga flexible, elastis

| mohs = 2.5–3.0

| luster = Vitreous hingga seperti mutiara

| polish =

| refractive = n_α = 1.565–1.625 <br/>n_β = 1.605–1.675 <br/>n_γ = 1.605–1.675

| dispersion = r < v (kaya Fe); <br/>r > v lemah (kaya Mg)

| absorption =

| streak = Putih

| gravity = 2.7–3.3<ref name=HBM/>

| melt =

| fusibility =

| diagnostic =

| solubility =

| other =

| references =<ref>[http://www.mindat.org/min-677.html Biotite mineral information and data Mindat]</ref><ref>[http://webmineral.com/data/Biotite.shtml Biotite Mineral Data Webmineral]</ref><ref name=HBM>[http://rruff.geo.arizona.edu/doclib/hom/biotite.pdf Handbook of Mineralogy]</ref>