Short answer. Yes. Where brothers and sisters of the half blood are the only survivors, some on the father's side and some on the mother's, the Civil Code gives them all equal shares, and expressly without distinction as to where the property in the estate came from.
What the law says
all shall inherit in equal shares without distinction as to the origin of the property
Civil Code, Article 1007 — Half-Blood Siblings Only. Read the full provision →
The rule closes off the argument families actually have
The dispute this article settles is predictable: the paternal half-siblings say the land that came from the father should go to them, and the maternal half-siblings say the same about property from the mother's side. The article refuses that division entirely. Shares are equal without distinction as to the origin of the property, so tracing where each asset came from is simply irrelevant to how the estate is split. The estate is treated as one mass and divided by head.
The article applies only when half-bloods are the only survivors
Read the condition carefully — it governs the case where half-blood brothers and sisters are the only survivors. That means no descendants, no ascendants, no surviving spouse, and, importantly, no full-blood siblings. The equal-shares outcome here follows from everyone in the class standing in the same relation to the deceased. Where a full-blood brother or sister also survives, this is not the article that governs, and the shares are no longer worked out this way.
Working out the fraction
The division is purely numerical: count the surviving half-siblings and divide by that number. Four of them, whatever the mix of paternal and maternal, take a quarter each. Nothing in the article adjusts for who lived with the deceased, who paid for the funeral, who maintained the property, or who was closer in life. Those may be real grievances, but they belong to a separate accounting between the heirs — they do not change the fractions this article fixes.
Prove the relationships before dividing
The whole computation depends on the family tree being right, so start with civil registry records — birth certificates for each claimed sibling showing the shared parent, and the death certificates and marriage records that establish nobody in a nearer class survives. A half-sibling nobody in the family talks about is exactly the sort of person who surfaces after a settlement is signed. Get the tree verified first, since a partition executed on an incomplete list is difficult to undo. The documents that settle this are the birth certificates of every sibling claiming a share, because the half-blood or full-blood link is proved from the parents named on them. Where a certificate is missing or names a parent inconsistently, that is the problem to fix before anyone argues about fractions.